400699 has 6 divisors (see below), whose sum is σ = 434076. Its totient is φ = 369720.

The previous prime is 400681. The next prime is 400703. The reversal of 400699 is 996004.

It is not a de Polignac number, because 400699 - 2⁹ = 400187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1017 + ... + 1354.

It is an arithmetic number, because the mean of its divisors is an integer number (72346).

2⁴⁰⁰⁶⁹⁹ is an apocalyptic number.

400699 is a deficient number, since it is larger than the sum of its proper divisors (33377).

400699 is a wasteful number, since it uses less digits than its factorization.

400699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2384 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 400699 is about 633.0078988449. The cubic root of 400699 is about 73.7235239637.

The spelling of 400699 in words is "four hundred thousand, six hundred ninety-nine".