521245079 has 2 divisors, whose sum is σ = 521245080. Its totient is φ = 521245078.

The previous prime is 521245051. The next prime is 521245091. The reversal of 521245079 is 970542125.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521245079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521245379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260622539 + 260622540.

It is an arithmetic number, because the mean of its divisors is an integer number (260622540).

Almost surely, 2^521245079 is an apocalyptic number.

521245079 is a deficient number, since it is larger than the sum of its proper divisors (1).

521245079 is an equidigital number, since it uses as much as digits as its factorization.

521245079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 521245079 is about 22830.7923427988. The cubic root of 521245079 is about 804.7864505627.

The spelling of 521245079 in words is "five hundred twenty-one million, two hundred forty-five thousand, seventy-nine".