87977796119 has 4 divisors (see below), whose sum is σ = 89216920080. Its totient is φ = 86738672160.

The previous prime is 87977796091. The next prime is 87977796169. The reversal of 87977796119 is 91169777978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87977796119 is a prime.

It is a super-2 number, since 2×87977796119² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (71), and also a Moran number because the ratio is a prime number: 1239123889 = 87977796119 / (8 + 7 + 9 + 7 + 7 + 7 + 9 + 6 + 1 + 1 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87977796169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619561874 + ... + 619562015.

It is an arithmetic number, because the mean of its divisors is an integer number (22304230020).

Almost surely, 2^87977796119 is an apocalyptic number.

87977796119 is a deficient number, since it is larger than the sum of its proper divisors (1239123961).

87977796119 is a wasteful number, since it uses less digits than its factorization.

87977796119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1239123960.

The product of its digits is 84015792, while the sum is 71.

The spelling of 87977796119 in words is "eighty-seven billion, nine hundred seventy-seven million, seven hundred ninety-six thousand, one hundred nineteen".