397108777 has 16 divisors (see below), whose sum is σ = 448197120. Its totient is φ = 349094592.

The previous prime is 397108757. The next prime is 397108783. The reversal of 397108777 is 777801793.

It is a cyclic number.

It is not a de Polignac number, because 397108777 - 2²³ = 388720169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397108777.

It is not an unprimeable number, because it can be changed into a prime (397108727) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68683 + ... + 74239.

It is an arithmetic number, because the mean of its divisors is an integer number (28012320).

Almost surely, 2^397108777 is an apocalyptic number.

It is an amenable number.

397108777 is a deficient number, since it is larger than the sum of its proper divisors (51088343).

397108777 is a wasteful number, since it uses less digits than its factorization.

397108777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832.

The product of its (nonzero) digits is 518616, while the sum is 49.

The square root of 397108777 is about 19927.5883387830. The cubic root of 397108777 is about 735.0267792239.

The spelling of 397108777 in words is "three hundred ninety-seven million, one hundred eight thousand, seven hundred seventy-seven".