397863705 has 16 divisors (see below), whose sum is σ = 670086720. Its totient is φ = 201025728.

The previous prime is 397863679. The next prime is 397863721. The reversal of 397863705 is 507368793.

It is not a de Polignac number, because 397863705 - 2⁸ = 397863449 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697722 + ... + 698291.

It is an arithmetic number, because the mean of its divisors is an integer number (41880420).

Almost surely, 2^397863705 is an apocalyptic number.

It is an amenable number.

397863705 is a deficient number, since it is larger than the sum of its proper divisors (272223015).

397863705 is a wasteful number, since it uses less digits than its factorization.

397863705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396040.

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 397863705 is about 19946.5211252489. The cubic root of 397863705 is about 735.4922612877.

The spelling of 397863705 in words is "three hundred ninety-seven million, eight hundred sixty-three thousand, seven hundred five".