2890109981 has 8 divisors (see below), whose sum is σ = 3212335584. Its totient is φ = 2577799120.

The previous prime is 2890109899. The next prime is 2890109983. The reversal of 2890109981 is 1899010982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2890109981 is a prime.

It is a super-2 number, since 2×2890109981² = 16705471404551640722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2890109983) 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, 2478071 + ... + 2479236.

It is an arithmetic number, because the mean of its divisors is an integer number (401541948).

Almost surely, 2^2890109981 is an apocalyptic number.

It is an amenable number.

2890109981 is a deficient number, since it is larger than the sum of its proper divisors (322225603).

2890109981 is a wasteful number, since it uses less digits than its factorization.

2890109981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4957371.

The product of its (nonzero) digits is 93312, while the sum is 47.

The square root of 2890109981 is about 53759.7431262464. The cubic root of 2890109981 is about 1424.4201980617.

The spelling of 2890109981 in words is "two billion, eight hundred ninety million, one hundred nine thousand, nine hundred eighty-one".