77354977 has 12 divisors (see below), whose sum is σ = 93088980. Its totient is φ = 64016736.

The previous prime is 77354971. The next prime is 77354993. The reversal of 77354977 is 77945377.

It can be written as a sum of positive squares in 2 ways, for example, as 23126481 + 54228496 = 4809^2 + 7364^2 .

It is a de Polignac number, because none of the positive numbers 2^k-77354977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77354977.

It is not an unprimeable number, because it can be changed into a prime (77354971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25798 + ... + 28639.

It is an arithmetic number, because the mean of its divisors is an integer number (7757415).

Almost surely, 2^77354977 is an apocalyptic number.

It is an amenable number.

77354977 is a deficient number, since it is larger than the sum of its proper divisors (15734003).

77354977 is a wasteful number, since it uses less digits than its factorization.

77354977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54480 (or 54473 counting only the distinct ones).

The product of its digits is 1296540, while the sum is 49.

The square root of 77354977 is about 8795.1678210254. The cubic root of 77354977 is about 426.0848446435.

The spelling of 77354977 in words is "seventy-seven million, three hundred fifty-four thousand, nine hundred seventy-seven".