397229081 has 4 divisors (see below), whose sum is σ = 397538064. Its totient is φ = 396920100.

The previous prime is 397229051. The next prime is 397229087. The reversal of 397229081 is 180922793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 397229081 - 2⁶ = 397229017 is a prime.

It is a super-2 number, since 2×397229081² = 315581885584209122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397229087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152555 + ... + 155136.

It is an arithmetic number, because the mean of its divisors is an integer number (99384516).

Almost surely, 2^397229081 is an apocalyptic number.

It is an amenable number.

397229081 is a deficient number, since it is larger than the sum of its proper divisors (308983).

397229081 is a wasteful number, since it uses less digits than its factorization.

397229081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308982.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 397229081 is about 19930.6066390364. The cubic root of 397229081 is about 735.1009971197.

The spelling of 397229081 in words is "three hundred ninety-seven million, two hundred twenty-nine thousand, eighty-one".