642313454 has 4 divisors (see below), whose sum is σ = 963470184. Its totient is φ = 321156726.

The previous prime is 642313447. The next prime is 642313481. The reversal of 642313454 is 454313246.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642313454.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160578362 + ... + 160578365.

It is an arithmetic number, because the mean of its divisors is an integer number (240867546).

Almost surely, 2^642313454 is an apocalyptic number.

642313454 is a deficient number, since it is larger than the sum of its proper divisors (321156730).

642313454 is a wasteful number, since it uses less digits than its factorization.

642313454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321156729.

The product of its digits is 34560, while the sum is 32.

The square root of 642313454 is about 25343.9036851074. The cubic root of 642313454 is about 862.8109993499.

The spelling of 642313454 in words is "six hundred forty-two million, three hundred thirteen thousand, four hundred fifty-four".