397501677 has 6 divisors (see below), whose sum is σ = 574169102. Its totient is φ = 265001112.

The previous prime is 397501669. The next prime is 397501711. The reversal of 397501677 is 776105793.

It can be written as a sum of positive squares in only one way, i.e., 381772521 + 15729156 = 19539^2 + 3966^2 .

It is not a de Polignac number, because 397501677 - 2³ = 397501669 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 (397501627) 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 5 ways as a sum of consecutive naturals, for example, 22083418 + ... + 22083435.

Almost surely, 2^397501677 is an apocalyptic number.

It is an amenable number.

397501677 is a deficient number, since it is larger than the sum of its proper divisors (176667425).

397501677 is a wasteful number, since it uses less digits than its factorization.

397501677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44166859 (or 44166856 counting only the distinct ones).

The product of its (nonzero) digits is 277830, while the sum is 45.

The square root of 397501677 is about 19937.4440939655. Note that the first 3 decimals coincide. The cubic root of 397501677 is about 735.2691115074.

The spelling of 397501677 in words is "three hundred ninety-seven million, five hundred one thousand, six hundred seventy-seven".