400991363 has 4 divisors (see below), whose sum is σ = 402892008. Its totient is φ = 399090720.

The previous prime is 400991347. The next prime is 400991387. The reversal of 400991363 is 363199004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400991363 - 2⁴ = 400991347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400991863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 950006 + ... + 950427.

It is an arithmetic number, because the mean of its divisors is an integer number (100723002).

Almost surely, 2^400991363 is an apocalyptic number.

400991363 is a deficient number, since it is larger than the sum of its proper divisors (1900645).

400991363 is a wasteful number, since it uses less digits than its factorization.

400991363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1900644.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 400991363 is about 20024.7687377408. The cubic root of 400991363 is about 737.4144996352.

The spelling of 400991363 in words is "four hundred million, nine hundred ninety-one thousand, three hundred sixty-three".