397777317 has 8 divisors (see below), whose sum is σ = 606136896. Its totient is φ = 227301312.

The previous prime is 397777277. The next prime is 397777361. The reversal of 397777317 is 713777793.

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

It is not a de Polignac number, because 397777317 - 2⁷ = 397777189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397777317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397777117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9470868 + ... + 9470909.

It is an arithmetic number, because the mean of its divisors is an integer number (75767112).

Almost surely, 2^397777317 is an apocalyptic number.

It is an amenable number.

397777317 is a deficient number, since it is larger than the sum of its proper divisors (208359579).

397777317 is a wasteful number, since it uses less digits than its factorization.

397777317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18941787.

The product of its digits is 1361367, while the sum is 51.

The square root of 397777317 is about 19944.3555172886. The cubic root of 397777317 is about 735.4390250464.

The spelling of 397777317 in words is "three hundred ninety-seven million, seven hundred seventy-seven thousand, three hundred seventeen".