77883139 has 2 divisors, whose sum is σ = 77883140. Its totient is φ = 77883138.

The previous prime is 77883107. The next prime is 77883151. The reversal of 77883139 is 93138877.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77883139 - 2⁵ = 77883107 is a prime.

It is not a weakly prime, because it can be changed into another prime (77883539) 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, 38941569 + 38941570.

It is an arithmetic number, because the mean of its divisors is an integer number (38941570).

Almost surely, 2^77883139 is an apocalyptic number.

77883139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77883139 is an equidigital number, since it uses as much as digits as its factorization.

77883139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 77883139 is about 8825.1424351112. The cubic root of 77883139 is about 427.0523823873.

The spelling of 77883139 in words is "seventy-seven million, eight hundred eighty-three thousand, one hundred thirty-nine".