581980987 has 12 divisors (see below), whose sum is σ = 677837160. Its totient is φ = 498222816.

The previous prime is 581980979. The next prime is 581980999. The reversal of 581980987 is 789089185.

It is not a de Polignac number, because 581980987 - 2³ = 581980979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (581980187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35064 + ... + 48922.

It is an arithmetic number, because the mean of its divisors is an integer number (56486430).

Almost surely, 2^581980987 is an apocalyptic number.

581980987 is a deficient number, since it is larger than the sum of its proper divisors (95856173).

581980987 is a wasteful number, since it uses less digits than its factorization.

581980987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14730 (or 14723 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 55.

The square root of 581980987 is about 24124.2821033083. The cubic root of 581980987 is about 834.9034690661.

It can be divided in two parts, 58 and 1980987, that added together give a triangular number (1981045 = T₁₉₉₀).

The spelling of 581980987 in words is "five hundred eighty-one million, nine hundred eighty thousand, nine hundred eighty-seven".