77625091 has 2 divisors, whose sum is σ = 77625092. Its totient is φ = 77625090.

The previous prime is 77625071. The next prime is 77625101. The reversal of 77625091 is 19052677.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77625091 - 2¹³ = 77616899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77625091.

It is not a weakly prime, because it can be changed into another prime (77625071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38812545 + 38812546.

It is an arithmetic number, because the mean of its divisors is an integer number (38812546).

Almost surely, 2^77625091 is an apocalyptic number.

77625091 is a deficient number, since it is larger than the sum of its proper divisors (1).

77625091 is an equidigital number, since it uses as much as digits as its factorization.

77625091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 77625091 is about 8810.5102576412. The cubic root of 77625091 is about 426.5802136713.

The spelling of 77625091 in words is "seventy-seven million, six hundred twenty-five thousand, ninety-one".