397417919 has 4 divisors (see below), whose sum is σ = 397465944. Its totient is φ = 397369896.

The previous prime is 397417907. The next prime is 397417921. The reversal of 397417919 is 919714793.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397417919 is a prime.

It is a super-2 number, since 2×397417919² = 315882004684581122, 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 (397417219) 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, 8072 + ... + 29325.

It is an arithmetic number, because the mean of its divisors is an integer number (99366486).

Almost surely, 2^397417919 is an apocalyptic number.

397417919 is a deficient number, since it is larger than the sum of its proper divisors (48025).

397417919 is a wasteful number, since it uses less digits than its factorization.

397417919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48024.

The product of its digits is 428652, while the sum is 50.

The square root of 397417919 is about 19935.3434633066. The cubic root of 397417919 is about 735.2174647682.

The spelling of 397417919 in words is "three hundred ninety-seven million, four hundred seventeen thousand, nine hundred nineteen".