520100639 has 2 divisors, whose sum is σ = 520100640. Its totient is φ = 520100638.

The previous prime is 520100591. The next prime is 520100683. The reversal of 520100639 is 936001025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520100639 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520100039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260050319 + 260050320.

It is an arithmetic number, because the mean of its divisors is an integer number (260050320).

Almost surely, 2^520100639 is an apocalyptic number.

520100639 is a deficient number, since it is larger than the sum of its proper divisors (1).

520100639 is an equidigital number, since it uses as much as digits as its factorization.

520100639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 520100639 is about 22805.7150512761. The cubic root of 520100639 is about 804.1970255278.

The spelling of 520100639 in words is "five hundred twenty million, one hundred thousand, six hundred thirty-nine".