77610139 has 2 divisors, whose sum is σ = 77610140. Its totient is φ = 77610138.

The previous prime is 77610131. The next prime is 77610149. The reversal of 77610139 is 93101677.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77610139 - 2³ = 77610131 is a prime.

It is a super-3 number, since 3×77610139³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (77610131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38805069 + 38805070.

It is an arithmetic number, because the mean of its divisors is an integer number (38805070).

Almost surely, 2^77610139 is an apocalyptic number.

77610139 is a deficient number, since it is larger than the sum of its proper divisors (1).

77610139 is an equidigital number, since it uses as much as digits as its factorization.

77610139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 77610139 is about 8809.6616847641. The cubic root of 77610139 is about 426.5528228847.

The spelling of 77610139 in words is "seventy-seven million, six hundred ten thousand, one hundred thirty-nine".