87019983 has 12 divisors (see below), whose sum is σ = 128370528. Its totient is φ = 56778720.

The previous prime is 87019979. The next prime is 87020029. The reversal of 87019983 is 38991078.

It is not a de Polignac number, because 87019983 - 2² = 87019979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87019973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102438 + ... + 103283.

It is an arithmetic number, because the mean of its divisors is an integer number (10697544).

Almost surely, 2^87019983 is an apocalyptic number.

87019983 is a deficient number, since it is larger than the sum of its proper divisors (41350545).

87019983 is a wasteful number, since it uses less digits than its factorization.

87019983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205774 (or 205771 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 87019983 is about 9328.4501928241. The cubic root of 87019983 is about 443.1386850989.

The spelling of 87019983 in words is "eighty-seven million, nineteen thousand, nine hundred eighty-three".