397196251 has 8 divisors (see below), whose sum is σ = 403683840. Its totient is φ = 390749352.

The previous prime is 397196237. The next prime is 397196263. The reversal of 397196251 is 152691793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397196251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397196198 and 397196207.

It is not an unprimeable number, because it can be changed into a prime (397196351) 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, 9826 + ... + 29848.

It is an arithmetic number, because the mean of its divisors is an integer number (50460480).

Almost surely, 2^397196251 is an apocalyptic number.

397196251 is a deficient number, since it is larger than the sum of its proper divisors (6487589).

397196251 is a wasteful number, since it uses less digits than its factorization.

397196251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20345.

The product of its digits is 102060, while the sum is 43.

The square root of 397196251 is about 19929.7830143732. The cubic root of 397196251 is about 735.0807451360.

The spelling of 397196251 in words is "three hundred ninety-seven million, one hundred ninety-six thousand, two hundred fifty-one".