77890499 has 2 divisors, whose sum is σ = 77890500. Its totient is φ = 77890498.

The previous prime is 77890471. The next prime is 77890511. The reversal of 77890499 is 99409877.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77890499 is a prime.

It is a super-3 number, since 3×77890499³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 77890499.

It is not a weakly prime, because it can be changed into another prime (77890409) 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, 38945249 + 38945250.

It is an arithmetic number, because the mean of its divisors is an integer number (38945250).

Almost surely, 2^77890499 is an apocalyptic number.

77890499 is a deficient number, since it is larger than the sum of its proper divisors (1).

77890499 is an equidigital number, since it uses as much as digits as its factorization.

77890499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The square root of 77890499 is about 8825.5594156971. The cubic root of 77890499 is about 427.0658341929.

The spelling of 77890499 in words is "seventy-seven million, eight hundred ninety thousand, four hundred ninety-nine".