87777673939 has 8 divisors (see below), whose sum is σ = 90719602560. Its totient is φ = 84842644800.

The previous prime is 87777673913. The next prime is 87777674059. The reversal of 87777673939 is 93937677778.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87777673939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87777673909) 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, 1698994 + ... + 1749895.

It is an arithmetic number, because the mean of its divisors is an integer number (11339950320).

Almost surely, 2^87777673939 is an apocalyptic number.

87777673939 is a deficient number, since it is larger than the sum of its proper divisors (2941928621).

87777673939 is a wasteful number, since it uses less digits than its factorization.

87777673939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3449741.

The product of its digits is 588110544, while the sum is 73.

The spelling of 87777673939 in words is "eighty-seven billion, seven hundred seventy-seven million, six hundred seventy-three thousand, nine hundred thirty-nine".