986870491 has 4 divisors (see below), whose sum is σ = 990710712. Its totient is φ = 983030272.

The previous prime is 986870473. The next prime is 986870527. The reversal of 986870491 is 194078689.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 194078689 = 7 ⋅27725527.

It is a cyclic number.

It is not a de Polignac number, because 986870491 - 2²³ = 978481883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (986570491) 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, 1919725 + ... + 1920238.

It is an arithmetic number, because the mean of its divisors is an integer number (247677678).

Almost surely, 2^986870491 is an apocalyptic number.

986870491 is a deficient number, since it is larger than the sum of its proper divisors (3840221).

986870491 is a wasteful number, since it uses less digits than its factorization.

986870491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3840220.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 986870491 is about 31414.4949187473. The cubic root of 986870491 is about 995.6042022758.

The spelling of 986870491 in words is "nine hundred eighty-six million, eight hundred seventy thousand, four hundred ninety-one".