521374907 has 2 divisors, whose sum is σ = 521374908. Its totient is φ = 521374906.

The previous prime is 521374883. The next prime is 521374913. The reversal of 521374907 is 709473125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521374907 - 2¹⁰ = 521373883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521374507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260687453 + 260687454.

It is an arithmetic number, because the mean of its divisors is an integer number (260687454).

Almost surely, 2^521374907 is an apocalyptic number.

521374907 is a deficient number, since it is larger than the sum of its proper divisors (1).

521374907 is an equidigital number, since it uses as much as digits as its factorization.

521374907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 521374907 is about 22833.6354310916. The cubic root of 521374907 is about 804.8532618357.

The spelling of 521374907 in words is "five hundred twenty-one million, three hundred seventy-four thousand, nine hundred seven".