397703977 has 16 divisors (see below), whose sum is σ = 449072064. Its totient is φ = 349056000.

The previous prime is 397703959. The next prime is 397703981. The reversal of 397703977 is 779307793.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 397703977 - 2⁷ = 397703849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397703377) 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 15 ways as a sum of consecutive naturals, for example, 39202 + ... + 48292.

It is an arithmetic number, because the mean of its divisors is an integer number (28067004).

Almost surely, 2^397703977 is an apocalyptic number.

It is an amenable number.

397703977 is a deficient number, since it is larger than the sum of its proper divisors (51368087).

397703977 is a wasteful number, since it uses less digits than its factorization.

397703977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240.

The product of its (nonzero) digits is 1750329, while the sum is 52.

The square root of 397703977 is about 19942.5168170921. The cubic root of 397703977 is about 735.3938235304.

The spelling of 397703977 in words is "three hundred ninety-seven million, seven hundred three thousand, nine hundred seventy-seven".