87019933969 has 4 divisors (see below), whose sum is σ = 87221836800. Its totient is φ = 86818031140.

The previous prime is 87019933967. The next prime is 87019933981. The reversal of 87019933969 is 96933991078.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87019933969 - 2¹ = 87019933967 is a prime.

It is a super-2 number, since 2×87019933969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87019933969.

It is not an unprimeable number, because it can be changed into a prime (87019933967) 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, 100950769 + ... + 100951630.

It is an arithmetic number, because the mean of its divisors is an integer number (21805459200).

Almost surely, 2^87019933969 is an apocalyptic number.

It is an amenable number.

87019933969 is a deficient number, since it is larger than the sum of its proper divisors (201902831).

87019933969 is a wasteful number, since it uses less digits than its factorization.

87019933969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201902830.

The product of its (nonzero) digits is 19840464, while the sum is 64.

The spelling of 87019933969 in words is "eighty-seven billion, nineteen million, nine hundred thirty-three thousand, nine hundred sixty-nine".