455751991 has 4 divisors (see below), whose sum is σ = 455851872. Its totient is φ = 455652112.

The previous prime is 455751979. The next prime is 455752007. The reversal of 455751991 is 199157554.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-455751991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (455751971) 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, 42751 + ... + 52336.

It is an arithmetic number, because the mean of its divisors is an integer number (113962968).

Almost surely, 2^455751991 is an apocalyptic number.

455751991 is a deficient number, since it is larger than the sum of its proper divisors (99881).

455751991 is an equidigital number, since it uses as much as digits as its factorization.

455751991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99880.

The product of its digits is 283500, while the sum is 46.

The square root of 455751991 is about 21348.3486715015. The cubic root of 455751991 is about 769.5606595877.

The spelling of 455751991 in words is "four hundred fifty-five million, seven hundred fifty-one thousand, nine hundred ninety-one".