397151705 has 8 divisors (see below), whose sum is σ = 504616392. Its totient is φ = 299031808.

The previous prime is 397151701. The next prime is 397151767. The reversal of 397151705 is 507151793.

It can be written as a sum of positive squares in 4 ways, for example, as 26512201 + 370639504 = 5149^2 + 19252^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 397151705 - 2² = 397151701 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397151701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2336102 + ... + 2336271.

It is an arithmetic number, because the mean of its divisors is an integer number (63077049).

Almost surely, 2^397151705 is an apocalyptic number.

It is an amenable number.

397151705 is a deficient number, since it is larger than the sum of its proper divisors (107464687).

397151705 is a wasteful number, since it uses less digits than its factorization.

397151705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672395.

The product of its (nonzero) digits is 33075, while the sum is 38.

The square root of 397151705 is about 19928.6654094046. The cubic root of 397151705 is about 735.0532640684.

The spelling of 397151705 in words is "three hundred ninety-seven million, one hundred fifty-one thousand, seven hundred five".