400970691 has 12 divisors (see below), whose sum is σ = 631832760. Its totient is φ = 243012480.

The previous prime is 400970683. The next prime is 400970701. The reversal of 400970691 is 196079004.

It is not a de Polignac number, because 400970691 - 2³ = 400970683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400970651) 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 11 ways as a sum of consecutive naturals, for example, 2025006 + ... + 2025203.

It is an arithmetic number, because the mean of its divisors is an integer number (52652730).

Almost surely, 2^400970691 is an apocalyptic number.

400970691 is a deficient number, since it is larger than the sum of its proper divisors (230862069).

400970691 is a wasteful number, since it uses less digits than its factorization.

400970691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4050226 (or 4050223 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 400970691 is about 20024.2525703208. The cubic root of 400970691 is about 737.4018276295.

The spelling of 400970691 in words is "four hundred million, nine hundred seventy thousand, six hundred ninety-one".