397413381 has 16 divisors (see below), whose sum is σ = 538560000. Its totient is φ = 260616048.

The previous prime is 397413377. The next prime is 397413383. The reversal of 397413381 is 183314793.

It is a happy number.

It is not a de Polignac number, because 397413381 - 2² = 397413377 is a prime.

It is a super-2 number, since 2×397413381² = 315874790795702322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397413383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264370 + ... + 265868.

It is an arithmetic number, because the mean of its divisors is an integer number (33660000).

Almost surely, 2^397413381 is an apocalyptic number.

It is an amenable number.

397413381 is a deficient number, since it is larger than the sum of its proper divisors (141146619).

397413381 is a wasteful number, since it uses less digits than its factorization.

397413381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888.

The product of its digits is 54432, while the sum is 39.

The square root of 397413381 is about 19935.2296450279. The cubic root of 397413381 is about 735.2146663459.

The spelling of 397413381 in words is "three hundred ninety-seven million, four hundred thirteen thousand, three hundred eighty-one".