2896291981 has 4 divisors (see below), whose sum is σ = 3159591264. Its totient is φ = 2632992700.

The previous prime is 2896291939. The next prime is 2896292027. The reversal of 2896291981 is 1891926982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2896291981 - 2²⁷ = 2762074253 is a prime.

It is a super-2 number, since 2×2896291981² = 16777014478409808722, 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 (2896291081) 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, 131649625 + ... + 131649646.

It is an arithmetic number, because the mean of its divisors is an integer number (789897816).

Almost surely, 2^2896291981 is an apocalyptic number.

It is an amenable number.

2896291981 is a deficient number, since it is larger than the sum of its proper divisors (263299283).

2896291981 is a wasteful number, since it uses less digits than its factorization.

2896291981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263299282.

The product of its digits is 1119744, while the sum is 55.

The square root of 2896291981 is about 53817.2089670209. The cubic root of 2896291981 is about 1425.4350953731.

The spelling of 2896291981 in words is "two billion, eight hundred ninety-six million, two hundred ninety-one thousand, nine hundred eighty-one".