400436997 has 4 divisors (see below), whose sum is σ = 533916000. Its totient is φ = 266957996.

The previous prime is 400436987. The next prime is 400436999. The reversal of 400436997 is 799634004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400436997 - 2⁸ = 400436741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400436999) 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 3 ways as a sum of consecutive naturals, for example, 66739497 + ... + 66739502.

It is an arithmetic number, because the mean of its divisors is an integer number (133479000).

Almost surely, 2^400436997 is an apocalyptic number.

It is an amenable number.

400436997 is a deficient number, since it is larger than the sum of its proper divisors (133479003).

400436997 is a wasteful number, since it uses less digits than its factorization.

400436997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133479002.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 400436997 is about 20010.9219427791. The cubic root of 400436997 is about 737.0745205275.

The spelling of 400436997 in words is "four hundred million, four hundred thirty-six thousand, nine hundred ninety-seven".