77162121 has 12 divisors (see below), whose sum is σ = 111541248. Its totient is φ = 51402264.

The previous prime is 77162093. The next prime is 77162153. The reversal of 77162121 is 12126177.

It is not a de Polignac number, because 77162121 - 2⁵ = 77162089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77162221) 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, 14056 + ... + 18758.

It is an arithmetic number, because the mean of its divisors is an integer number (9295104).

Almost surely, 2^77162121 is an apocalyptic number.

It is an amenable number.

77162121 is a deficient number, since it is larger than the sum of its proper divisors (34379127).

77162121 is a wasteful number, since it uses less digits than its factorization.

77162121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532 (or 6529 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 77162121 is about 8784.1972313923. The cubic root of 77162121 is about 425.7304550228.

Adding to 77162121 its reverse (12126177), we get a palindrome (89288298).

The spelling of 77162121 in words is "seventy-seven million, one hundred sixty-two thousand, one hundred twenty-one".