77763139 has 2 divisors, whose sum is σ = 77763140. Its totient is φ = 77763138.

The previous prime is 77763109. The next prime is 77763157. The reversal of 77763139 is 93136777.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77763139 - 2¹³ = 77754947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77763095 and 77763104.

It is not a weakly prime, because it can be changed into another prime (77763109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38881569 + 38881570.

It is an arithmetic number, because the mean of its divisors is an integer number (38881570).

Almost surely, 2^77763139 is an apocalyptic number.

77763139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77763139 is an equidigital number, since it uses as much as digits as its factorization.

77763139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 166698, while the sum is 43.

The square root of 77763139 is about 8818.3410571377. The cubic root of 77763139 is about 426.8329398196.

The spelling of 77763139 in words is "seventy-seven million, seven hundred sixty-three thousand, one hundred thirty-nine".