477638639 has 2 divisors, whose sum is σ = 477638640. Its totient is φ = 477638638.

The previous prime is 477638599. The next prime is 477638653. The reversal of 477638639 is 936836774.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 477638639 - 2⁸ = 477638383 is a prime.

It is a super-3 number, since 3×477638639³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (477638659) 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 as a sum of consecutive naturals, namely, 238819319 + 238819320.

It is an arithmetic number, because the mean of its divisors is an integer number (238819320).

Almost surely, 2^477638639 is an apocalyptic number.

477638639 is a deficient number, since it is larger than the sum of its proper divisors (1).

477638639 is an equidigital number, since it uses as much as digits as its factorization.

477638639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 53.

The square root of 477638639 is about 21854.9454128808. The cubic root of 477638639 is about 781.6874703667.

The spelling of 477638639 in words is "four hundred seventy-seven million, six hundred thirty-eight thousand, six hundred thirty-nine".