397066919 has 8 divisors (see below), whose sum is σ = 407505168. Its totient is φ = 386664640.

The previous prime is 397066913. The next prime is 397066961. The reversal of 397066919 is 919660793.

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 397066919 - 2⁴ = 397066903 is a prime.

It is a super-2 number, since 2×397066919² = 315324276328305122, 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 (397066913) 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, 14144 + ... + 31530.

It is an arithmetic number, because the mean of its divisors is an integer number (50938146).

Almost surely, 2^397066919 is an apocalyptic number.

397066919 is a deficient number, since it is larger than the sum of its proper divisors (10438249).

397066919 is a wasteful number, since it uses less digits than its factorization.

397066919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17985.

The product of its (nonzero) digits is 551124, while the sum is 50.

The square root of 397066919 is about 19926.5380585791. The cubic root of 397066919 is about 735.0009526882. Note that the first 3 decimals are identical.

The spelling of 397066919 in words is "three hundred ninety-seven million, sixty-six thousand, nine hundred nineteen".