521437087 has 2 divisors, whose sum is σ = 521437088. Its totient is φ = 521437086.

The previous prime is 521437079. The next prime is 521437097. The reversal of 521437087 is 780734125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521437087 - 2³ = 521437079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521437097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260718543 + 260718544.

It is an arithmetic number, because the mean of its divisors is an integer number (260718544).

Almost surely, 2^521437087 is an apocalyptic number.

521437087 is a deficient number, since it is larger than the sum of its proper divisors (1).

521437087 is an equidigital number, since it uses as much as digits as its factorization.

521437087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 521437087 is about 22834.9969783226. The cubic root of 521437087 is about 804.8852565902.

The spelling of 521437087 in words is "five hundred twenty-one million, four hundred thirty-seven thousand, eighty-seven".