197213239 has 6 divisors (see below), whose sum is σ = 202142360. Its totient is φ = 192401520.

The previous prime is 197213207. The next prime is 197213249. The reversal of 197213239 is 932312791.

It is a happy number.

It is not a de Polignac number, because 197213239 - 2⁵ = 197213207 is a prime.

It is a super-2 number, since 2×197213239² = 77786123273742242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197213198 and 197213207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197213249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56979 + ... + 60340.

Almost surely, 2^197213239 is an apocalyptic number.

197213239 is a deficient number, since it is larger than the sum of its proper divisors (4929121).

197213239 is an equidigital number, since it uses as much as digits as its factorization.

197213239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117401 (or 117360 counting only the distinct ones).

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

The square root of 197213239 is about 14043.2631179509. The cubic root of 197213239 is about 582.0746539648.

The spelling of 197213239 in words is "one hundred ninety-seven million, two hundred thirteen thousand, two hundred thirty-nine".