2987698581 has 64 divisors (see below), whose sum is σ = 5322240000. Its totient is φ = 1620271296.

The previous prime is 2987698573. The next prime is 2987698613. The reversal of 2987698581 is 1858967892.

It is a happy number.

It is not a de Polignac number, because 2987698581 - 2³ = 2987698573 is a prime.

It is a super-2 number, since 2×2987698581² = 17852685621818827122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2987698381) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 318760 + ... + 327998.

It is an arithmetic number, because the mean of its divisors is an integer number (83160000).

Almost surely, 2^2987698581 is an apocalyptic number.

2987698581 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2987698581 is a deficient number, since it is larger than the sum of its proper divisors (2334541419).

2987698581 is a wasteful number, since it uses less digits than its factorization.

2987698581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9343 (or 9337 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 63.

The square root of 2987698581 is about 54659.8443192075. The cubic root of 2987698581 is about 1440.2755679219.

The spelling of 2987698581 in words is "two billion, nine hundred eighty-seven million, six hundred ninety-eight thousand, five hundred eighty-one".