386981697 has 4 divisors (see below), whose sum is σ = 515975600. Its totient is φ = 257987796.

The previous prime is 386981689. The next prime is 386981731. The reversal of 386981697 is 796189683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 386981697 - 2³ = 386981689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (386981627) 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, 64496947 + ... + 64496952.

It is an arithmetic number, because the mean of its divisors is an integer number (128993900).

Almost surely, 2^386981697 is an apocalyptic number.

It is an amenable number.

386981697 is a deficient number, since it is larger than the sum of its proper divisors (128993903).

386981697 is a wasteful number, since it uses less digits than its factorization.

386981697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128993902.

The product of its digits is 3919104, while the sum is 57.

The square root of 386981697 is about 19671.8503705168. The cubic root of 386981697 is about 728.7246745090.

The spelling of 386981697 in words is "three hundred eighty-six million, nine hundred eighty-one thousand, six hundred ninety-seven".