77874889 has 8 divisors (see below), whose sum is σ = 81144000. Its totient is φ = 74644752.

The previous prime is 77874877. The next prime is 77874917. The reversal of 77874889 is 98847877.

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 77874889 - 2⁷ = 77874761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77874809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5629 + ... + 13690.

It is an arithmetic number, because the mean of its divisors is an integer number (10143000).

Almost surely, 2^77874889 is an apocalyptic number.

It is an amenable number.

77874889 is a deficient number, since it is larger than the sum of its proper divisors (3269111).

77874889 is a wasteful number, since it uses less digits than its factorization.

77874889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19487.

The product of its digits is 6322176, while the sum is 58.

The square root of 77874889 is about 8824.6750081802. The cubic root of 77874889 is about 427.0373029294.

The spelling of 77874889 in words is "seventy-seven million, eight hundred seventy-four thousand, eight hundred eighty-nine".