521121079 has 2 divisors, whose sum is σ = 521121080. Its totient is φ = 521121078.

The previous prime is 521121059. The next prime is 521121091. The reversal of 521121079 is 970121125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521121079 - 2⁵ = 521121047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521121049) 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, 260560539 + 260560540.

It is an arithmetic number, because the mean of its divisors is an integer number (260560540).

Almost surely, 2^521121079 is an apocalyptic number.

521121079 is a deficient number, since it is larger than the sum of its proper divisors (1).

521121079 is an equidigital number, since it uses as much as digits as its factorization.

521121079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 521121079 is about 22828.0765505988. The cubic root of 521121079 is about 804.7226280997.

The spelling of 521121079 in words is "five hundred twenty-one million, one hundred twenty-one thousand, seventy-nine".