397769999 has 8 divisors (see below), whose sum is σ = 434306640. Its totient is φ = 361296000.

The previous prime is 397769993. The next prime is 397770001. The reversal of 397769999 is 999967793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397769999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397769993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1844 + ... + 28265.

It is an arithmetic number, because the mean of its divisors is an integer number (54288330).

Almost surely, 2^397769999 is an apocalyptic number.

397769999 is a deficient number, since it is larger than the sum of its proper divisors (36536641).

397769999 is a wasteful number, since it uses less digits than its factorization.

397769999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31321.

The product of its digits is 52081218, while the sum is 68.

The square root of 397769999 is about 19944.1720560168. The cubic root of 397769999 is about 735.4345150056.

The spelling of 397769999 in words is "three hundred ninety-seven million, seven hundred sixty-nine thousand, nine hundred ninety-nine".