400949993 has 8 divisors (see below), whose sum is σ = 407448000. Its totient is φ = 394475760.

The previous prime is 400949977. The next prime is 400949999. The reversal of 400949993 is 399949004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400949993 - 2⁴ = 400949977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400949999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29771 + ... + 41087.

It is an arithmetic number, because the mean of its divisors is an integer number (50931000).

Almost surely, 2^400949993 is an apocalyptic number.

It is an amenable number.

400949993 is a deficient number, since it is larger than the sum of its proper divisors (6498007).

400949993 is a wasteful number, since it uses less digits than its factorization.

400949993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11887.

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 400949993 is about 20023.7357403657. The cubic root of 400949993 is about 737.3891392493.

The spelling of 400949993 in words is "four hundred million, nine hundred forty-nine thousand, nine hundred ninety-three".