87898981 has 8 divisors (see below), whose sum is σ = 91756800. Its totient is φ = 84105120.

The previous prime is 87898949. The next prime is 87898991. The reversal of 87898981 is 18989878.

87898981 is nontrivially palindromic in base 6.

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

It is a cyclic number.

It is not a de Polignac number, because 87898981 - 2⁵ = 87898949 is a prime.

It is a super-2 number, since 2×87898981² = 15452461721676722, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87898901) 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, 13171 + ... + 18688.

It is an arithmetic number, because the mean of its divisors is an integer number (11469600).

Almost surely, 2^87898981 is an apocalyptic number.

It is an amenable number.

87898981 is a deficient number, since it is larger than the sum of its proper divisors (3857819).

87898981 is a wasteful number, since it uses less digits than its factorization.

87898981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31979.

The product of its digits is 2322432, while the sum is 58.

The square root of 87898981 is about 9375.4456427415. The cubic root of 87898981 is about 444.6257527602.

The spelling of 87898981 in words is "eighty-seven million, eight hundred ninety-eight thousand, nine hundred eighty-one".