451400399 has 4 divisors (see below), whose sum is σ = 466965960. Its totient is φ = 435834840.

The previous prime is 451400381. The next prime is 451400401. The reversal of 451400399 is 993004154.

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-451400399 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 (450400399) 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 3 ways as a sum of consecutive naturals, for example, 7782737 + ... + 7782794.

It is an arithmetic number, because the mean of its divisors is an integer number (116741490).

Almost surely, 2^451400399 is an apocalyptic number.

451400399 is a deficient number, since it is larger than the sum of its proper divisors (15565561).

451400399 is a wasteful number, since it uses less digits than its factorization.

451400399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15565560.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 451400399 is about 21246.1855164639. The cubic root of 451400399 is about 767.1035269724.

The spelling of 451400399 in words is "four hundred fifty-one million, four hundred thousand, three hundred ninety-nine".