87021982313 has 8 divisors (see below), whose sum is σ = 99460970880. Its totient is φ = 74584812960.

The previous prime is 87021982309. The next prime is 87021982361. The reversal of 87021982313 is 31328912078.

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

It is not a de Polignac number, because 87021982313 - 2² = 87021982309 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87021982303) 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, 350708 + ... + 545013.

It is an arithmetic number, because the mean of its divisors is an integer number (12432621360).

Almost surely, 2^87021982313 is an apocalyptic number.

It is an amenable number.

87021982313 is a deficient number, since it is larger than the sum of its proper divisors (12438988567).

87021982313 is a wasteful number, since it uses less digits than its factorization.

87021982313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909607.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 87021982313 in words is "eighty-seven billion, twenty-one million, nine hundred eighty-two thousand, three hundred thirteen".