77216039 has 2 divisors, whose sum is σ = 77216040. Its totient is φ = 77216038.

The previous prime is 77216021. The next prime is 77216047. The reversal of 77216039 is 93061277.

It is a strong prime.

It is an emirp because it is prime and its reverse (93061277) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77216039 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77216099) 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, 38608019 + 38608020.

It is an arithmetic number, because the mean of its divisors is an integer number (38608020).

Almost surely, 2^77216039 is an apocalyptic number.

77216039 is a deficient number, since it is larger than the sum of its proper divisors (1).

77216039 is an equidigital number, since it uses as much as digits as its factorization.

77216039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 77216039 is about 8787.2657294519. The cubic root of 77216039 is about 425.8295934336.

The spelling of 77216039 in words is "seventy-seven million, two hundred sixteen thousand, thirty-nine".