921400499 has 8 divisors (see below), whose sum is σ = 953512560. Its totient is φ = 889311136.

The previous prime is 921400489. The next prime is 921400511. The reversal of 921400499 is 994004129.

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 921400499 - 2⁸ = 921400243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921400489) 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, 146177 + ... + 152349.

It is an arithmetic number, because the mean of its divisors is an integer number (119189070).

Almost surely, 2^921400499 is an apocalyptic number.

921400499 is a deficient number, since it is larger than the sum of its proper divisors (32112061).

921400499 is a wasteful number, since it uses less digits than its factorization.

921400499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11349.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 921400499 is about 30354.5795391733. The cubic root of 921400499 is about 973.0820940055.

The spelling of 921400499 in words is "nine hundred twenty-one million, four hundred thousand, four hundred ninety-nine".