77575013 has 2 divisors, whose sum is σ = 77575014. Its totient is φ = 77575012.

The previous prime is 77575009. The next prime is 77575031. The reversal of 77575013 is 31057577.

Together with next prime (77575031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68442529 + 9132484 = 8273^2 + 3022^2 .

It is a cyclic number.

It is not a de Polignac number, because 77575013 - 2² = 77575009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77575033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38787506 + 38787507.

It is an arithmetic number, because the mean of its divisors is an integer number (38787507).

Almost surely, 2^77575013 is an apocalyptic number.

It is an amenable number.

77575013 is a deficient number, since it is larger than the sum of its proper divisors (1).

77575013 is an equidigital number, since it uses as much as digits as its factorization.

77575013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25725, while the sum is 35.

The square root of 77575013 is about 8807.6678525022. The cubic root of 77575013 is about 426.4884612104.

The spelling of 77575013 in words is "seventy-seven million, five hundred seventy-five thousand, thirteen".