77037997 has 2 divisors, whose sum is σ = 77037998. Its totient is φ = 77037996.

The previous prime is 77037979. The next prime is 77038019. The reversal of 77037997 is 79973077.

It is a happy number.

Together with previous prime (77037979) 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., 47073321 + 29964676 = 6861^2 + 5474^2 .

It is a cyclic number.

It is not a de Polignac number, because 77037997 - 2⁷ = 77037869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77037997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77037907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38518998 + 38518999.

It is an arithmetic number, because the mean of its divisors is an integer number (38518999).

Almost surely, 2^77037997 is an apocalyptic number.

It is an amenable number.

77037997 is a deficient number, since it is larger than the sum of its proper divisors (1).

77037997 is an equidigital number, since it uses as much as digits as its factorization.

77037997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583443, while the sum is 49.

The square root of 77037997 is about 8777.1292003707. The cubic root of 77037997 is about 425.5020539779.

The spelling of 77037997 in words is "seventy-seven million, thirty-seven thousand, nine hundred ninety-seven".