454399639 has 2 divisors, whose sum is σ = 454399640. Its totient is φ = 454399638.

The previous prime is 454399633. The next prime is 454399663. The reversal of 454399639 is 936993454.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 454399639 - 2¹⁹ = 453875351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (454399633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227199819 + 227199820.

It is an arithmetic number, because the mean of its divisors is an integer number (227199820).

Almost surely, 2^454399639 is an apocalyptic number.

454399639 is a deficient number, since it is larger than the sum of its proper divisors (1).

454399639 is an equidigital number, since it uses as much as digits as its factorization.

454399639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 52.

The square root of 454399639 is about 21316.6516836017. The cubic root of 454399639 is about 768.7987335180.

The spelling of 454399639 in words is "four hundred fifty-four million, three hundred ninety-nine thousand, six hundred thirty-nine".