77676149 has 2 divisors, whose sum is σ = 77676150. Its totient is φ = 77676148.

The previous prime is 77676139. The next prime is 77676167. The reversal of 77676149 is 94167677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73444900 + 4231249 = 8570^2 + 2057^2 .

It is a cyclic number.

It is not a de Polignac number, because 77676149 - 2⁸ = 77675893 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 (77676139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38838074 + 38838075.

It is an arithmetic number, because the mean of its divisors is an integer number (38838075).

Almost surely, 2^77676149 is an apocalyptic number.

It is an amenable number.

77676149 is a deficient number, since it is larger than the sum of its proper divisors (1).

77676149 is an equidigital number, since it uses as much as digits as its factorization.

77676149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The square root of 77676149 is about 8813.4073433605. The cubic root of 77676149 is about 426.6737210612.

The spelling of 77676149 in words is "seventy-seven million, six hundred seventy-six thousand, one hundred forty-nine".