77051489 has 2 divisors, whose sum is σ = 77051490. Its totient is φ = 77051488.

The previous prime is 77051477. The next prime is 77051537. The reversal of 77051489 is 98415077.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75550864 + 1500625 = 8692^2 + 1225^2 .

It is an emirp because it is prime and its reverse (98415077) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 77051489 - 2²⁴ = 60274273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (77051419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38525744 + 38525745.

It is an arithmetic number, because the mean of its divisors is an integer number (38525745).

Almost surely, 2^77051489 is an apocalyptic number.

It is an amenable number.

77051489 is a deficient number, since it is larger than the sum of its proper divisors (1).

77051489 is an equidigital number, since it uses as much as digits as its factorization.

77051489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 77051489 is about 8777.8977551576. The cubic root of 77051489 is about 425.5268925373.

The spelling of 77051489 in words is "seventy-seven million, fifty-one thousand, four hundred eighty-nine".