77497933 has 2 divisors, whose sum is σ = 77497934. Its totient is φ = 77497932.

The previous prime is 77497919. The next prime is 77497993. The reversal of 77497933 is 33979477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76422564 + 1075369 = 8742^2 + 1037^2 .

It is a cyclic number.

It is not a de Polignac number, because 77497933 - 2²¹ = 75400781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77497993) 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, 38748966 + 38748967.

It is an arithmetic number, because the mean of its divisors is an integer number (38748967).

Almost surely, 2^77497933 is an apocalyptic number.

It is an amenable number.

77497933 is a deficient number, since it is larger than the sum of its proper divisors (1).

77497933 is an equidigital number, since it uses as much as digits as its factorization.

77497933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188, while the sum is 49.

The square root of 77497933 is about 8803.2910323356. The cubic root of 77497933 is about 426.3471587329.

The spelling of 77497933 in words is "seventy-seven million, four hundred ninety-seven thousand, nine hundred thirty-three".