521607061 has 2 divisors, whose sum is σ = 521607062. Its totient is φ = 521607060.

The previous prime is 521607013. The next prime is 521607077. The reversal of 521607061 is 160706125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 521208900 + 398161 = 22830^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 521607061 - 2¹⁷ = 521475989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521607761) 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, 260803530 + 260803531.

It is an arithmetic number, because the mean of its divisors is an integer number (260803531).

Almost surely, 2^521607061 is an apocalyptic number.

It is an amenable number.

521607061 is a deficient number, since it is larger than the sum of its proper divisors (1).

521607061 is an equidigital number, since it uses as much as digits as its factorization.

521607061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 521607061 is about 22838.7184622956. The cubic root of 521607061 is about 804.9727038312.

The spelling of 521607061 in words is "five hundred twenty-one million, six hundred seven thousand, sixty-one".