77993154 has 12 divisors (see below), whose sum is σ = 168985206. Its totient is φ = 25997712.

The previous prime is 77993147. The next prime is 77993189. The reversal of 77993154 is 45139977.

It can be written as a sum of positive squares in only one way, i.e., 75220929 + 2772225 = 8673^2 + 1665^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2166459 + ... + 2166494.

Almost surely, 2^77993154 is an apocalyptic number.

77993154 is an abundant number, since it is smaller than the sum of its proper divisors (90992052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77993154 is a wasteful number, since it uses less digits than its factorization.

77993154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4332961 (or 4332958 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 77993154 is about 8831.3732793943. The cubic root of 77993154 is about 427.2533675385.

The spelling of 77993154 in words is "seventy-seven million, nine hundred ninety-three thousand, one hundred fifty-four".