658987 has 8 divisors (see below), whose sum is σ = 769536. Its totient is φ = 552552.

The previous prime is 658979. The next prime is 658991. The reversal of 658987 is 789856.

It is a happy number.

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

It is not a de Polignac number, because 658987 - 2³ = 658979 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

658987 is a modest number, since divided by 987 gives 658 as remainder.

It is not an unprimeable number, because it can be changed into a prime (658907) 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, 673 + ... + 1330.

It is an arithmetic number, because the mean of its divisors is an integer number (96192).

2⁶⁵⁸⁹⁸⁷ is an apocalyptic number.

658987 is a deficient number, since it is larger than the sum of its proper divisors (110549).

658987 is a wasteful number, since it uses less digits than its factorization.

658987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057.

The product of its digits is 120960, while the sum is 43.

The square root of 658987 is about 811.7801426495. The cubic root of 658987 is about 87.0213097929.

The spelling of 658987 in words is "six hundred fifty-eight thousand, nine hundred eighty-seven".