400997697 has 8 divisors (see below), whose sum is σ = 535316544. Its totient is φ = 267005328.

The previous prime is 400997677. The next prime is 400997719. The reversal of 400997697 is 796799004.

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

It is not a de Polignac number, because 400997697 - 2¹¹ = 400995649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400997647) 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 7 ways as a sum of consecutive naturals, for example, 78738 + ... + 83675.

It is an arithmetic number, because the mean of its divisors is an integer number (66914568).

Almost surely, 2^400997697 is an apocalyptic number.

It is an amenable number.

400997697 is a deficient number, since it is larger than the sum of its proper divisors (134318847).

400997697 is a wasteful number, since it uses less digits than its factorization.

400997697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163239.

The product of its (nonzero) digits is 857304, while the sum is 51.

The square root of 400997697 is about 20024.9268912523. The cubic root of 400997697 is about 737.4183823113.

The spelling of 400997697 in words is "four hundred million, nine hundred ninety-seven thousand, six hundred ninety-seven".