87371056019 has 4 divisors (see below), whose sum is σ = 94091906496. Its totient is φ = 80650205544.

The previous prime is 87371056007. The next prime is 87371056021. The reversal of 87371056019 is 91065017378.

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-87371056019 is a prime.

It is a super-2 number, since 2×87371056019² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87371056049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3360425219 + ... + 3360425244.

It is an arithmetic number, because the mean of its divisors is an integer number (23522976624).

Almost surely, 2^87371056019 is an apocalyptic number.

87371056019 is a deficient number, since it is larger than the sum of its proper divisors (6720850477).

87371056019 is a wasteful number, since it uses less digits than its factorization.

87371056019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6720850476.

The product of its (nonzero) digits is 317520, while the sum is 47.

The spelling of 87371056019 in words is "eighty-seven billion, three hundred seventy-one million, fifty-six thousand, nineteen".