197293213 has 8 divisors (see below), whose sum is σ = 218212568. Its totient is φ = 177194304.

The previous prime is 197293193. The next prime is 197293219. The reversal of 197293213 is 312392791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6770404 + 190522809 = 2602^2 + 13803^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197293213 - 2⁵ = 197293181 is a prime.

It is a super-2 number, since 2×197293213² = 77849223791726738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197293219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204606 + ... + 205567.

It is an arithmetic number, because the mean of its divisors is an integer number (27276571).

Almost surely, 2^197293213 is an apocalyptic number.

197293213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

197293213 is a deficient number, since it is larger than the sum of its proper divisors (20919355).

197293213 is a wasteful number, since it uses less digits than its factorization.

197293213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410223.

The product of its digits is 20412, while the sum is 37.

The square root of 197293213 is about 14046.1102444769. The cubic root of 197293213 is about 582.1533243888.

It can be divided in two parts, 197293 and 213, that added together give a triangular number (197506 = T₆₂₈).

The spelling of 197293213 in words is "one hundred ninety-seven million, two hundred ninety-three thousand, two hundred thirteen".