77020136 has 8 divisors (see below), whose sum is σ = 144412770. Its totient is φ = 38510064.

The previous prime is 77020121. The next prime is 77020147. The reversal of 77020136 is 63102077.

It can be written as a sum of positive squares in only one way, i.e., 42328036 + 34692100 = 6506^2 + 5890^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4813751 + ... + 4813766.

Almost surely, 2^77020136 is an apocalyptic number.

It is an amenable number.

77020136 is a deficient number, since it is larger than the sum of its proper divisors (67392634).

77020136 is a wasteful number, since it uses less digits than its factorization.

77020136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9627523 (or 9627519 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 77020136 is about 8776.1116674755. Note that the first 3 decimals coincide. The cubic root of 77020136 is about 425.4691676971.

The spelling of 77020136 in words is "seventy-seven million, twenty thousand, one hundred thirty-six".