397950511 has 6 divisors (see below), whose sum is σ = 462922080. Its totient is φ = 341100396.

The previous prime is 397950493. The next prime is 397950517. The reversal of 397950511 is 115059793.

It is a de Polignac number, because none of the positive numbers 2^k-397950511 is a prime.

It is a super-2 number, since 2×397950511² = 316729218410322242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397950517) 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, 4060671 + ... + 4060768.

It is an arithmetic number, because the mean of its divisors is an integer number (77153680).

Almost surely, 2^397950511 is an apocalyptic number.

397950511 is a deficient number, since it is larger than the sum of its proper divisors (64971569).

397950511 is an equidigital number, since it uses as much as digits as its factorization.

397950511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8121453 (or 8121446 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 40.

The square root of 397950511 is about 19948.6969749906. The cubic root of 397950511 is about 735.5457473583.

The spelling of 397950511 in words is "three hundred ninety-seven million, nine hundred fifty thousand, five hundred eleven".