397052291 has 8 divisors (see below), whose sum is σ = 429246480. Its totient is φ = 365987808.

The previous prime is 397052269. The next prime is 397052317. The reversal of 397052291 is 192250793.

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 397052291 - 2²² = 392857987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397052261) 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, 281696 + ... + 283101.

It is an arithmetic number, because the mean of its divisors is an integer number (53655810).

Almost surely, 2^397052291 is an apocalyptic number.

397052291 is a deficient number, since it is larger than the sum of its proper divisors (32194189).

397052291 is a wasteful number, since it uses less digits than its factorization.

397052291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564853.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 397052291 is about 19926.1710069948. The cubic root of 397052291 is about 734.9919267319.

The spelling of 397052291 in words is "three hundred ninety-seven million, fifty-two thousand, two hundred ninety-one".