400193913 has 8 divisors (see below), whose sum is σ = 609819328. Its totient is φ = 228682224.

The previous prime is 400193897. The next prime is 400193921. The reversal of 400193913 is 319391004.

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

It is not a de Polignac number, because 400193913 - 2⁴ = 400193897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (400193993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9528406 + ... + 9528447.

It is an arithmetic number, because the mean of its divisors is an integer number (76227416).

Almost surely, 2^400193913 is an apocalyptic number.

It is an amenable number.

400193913 is a deficient number, since it is larger than the sum of its proper divisors (209625415).

400193913 is a wasteful number, since it uses less digits than its factorization.

400193913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19056863.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 400193913 is about 20004.8472376072. The cubic root of 400193913 is about 736.9253440933.

The spelling of 400193913 in words is "four hundred million, one hundred ninety-three thousand, nine hundred thirteen".