77132891 has 8 divisors (see below), whose sum is σ = 84326400. Its totient is φ = 69969640.

The previous prime is 77132873. The next prime is 77132899. The reversal of 77132891 is 19823177.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77132891 - 2¹⁰ = 77131867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77132899) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2051 + ... + 12588.

It is an arithmetic number, because the mean of its divisors is an integer number (10540800).

Almost surely, 2^77132891 is an apocalyptic number.

77132891 is a deficient number, since it is larger than the sum of its proper divisors (7193509).

77132891 is a wasteful number, since it uses less digits than its factorization.

77132891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15129.

The product of its digits is 21168, while the sum is 38.

The square root of 77132891 is about 8782.5332905717. The cubic root of 77132891 is about 425.6766908498.

The spelling of 77132891 in words is "seventy-seven million, one hundred thirty-two thousand, eight hundred ninety-one".