197351021 has 8 divisors (see below), whose sum is σ = 226070784. Its totient is φ = 168762960.

The previous prime is 197350973. The next prime is 197351023. The reversal of 197351021 is 120153791.

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 197351021 - 2¹⁴ = 197334637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197351023) 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, 29690 + ... + 35723.

It is an arithmetic number, because the mean of its divisors is an integer number (28258848).

Almost surely, 2^197351021 is an apocalyptic number.

It is an amenable number.

197351021 is a deficient number, since it is larger than the sum of its proper divisors (28719763).

197351021 is an equidigital number, since it uses as much as digits as its factorization.

197351021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65851.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 197351021 is about 14048.1678876642. The cubic root of 197351021 is about 582.2101768818.

The spelling of 197351021 in words is "one hundred ninety-seven million, three hundred fifty-one thousand, twenty-one".