454639639 has 2 divisors, whose sum is σ = 454639640. Its totient is φ = 454639638.

The previous prime is 454639637. The next prime is 454639651. The reversal of 454639639 is 936936454.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 454639639 - 2¹ = 454639637 is a prime.

Together with 454639637, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 454639592 and 454639601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454639637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227319819 + 227319820.

It is an arithmetic number, because the mean of its divisors is an integer number (227319820).

Almost surely, 2^454639639 is an apocalyptic number.

454639639 is a deficient number, since it is larger than the sum of its proper divisors (1).

454639639 is an equidigital number, since it uses as much as digits as its factorization.

454639639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 49.

The square root of 454639639 is about 21322.2803424024. The cubic root of 454639639 is about 768.9340616926.

The spelling of 454639639 in words is "four hundred fifty-four million, six hundred thirty-nine thousand, six hundred thirty-nine".