2900863891 has 4 divisors (see below), whose sum is σ = 3026988432. Its totient is φ = 2774739352.

The previous prime is 2900863883. The next prime is 2900863897. The reversal of 2900863891 is 1983680092.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2900863891 - 2³ = 2900863883 is a prime.

It is a super-2 number, since 2×2900863891² = 16830022628215319762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2900863897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63062236 + ... + 63062281.

It is an arithmetic number, because the mean of its divisors is an integer number (756747108).

Almost surely, 2^2900863891 is an apocalyptic number.

2900863891 is a deficient number, since it is larger than the sum of its proper divisors (126124541).

2900863891 is a wasteful number, since it uses less digits than its factorization.

2900863891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126124540.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 2900863891 is about 53859.6685006508. The cubic root of 2900863891 is about 1426.1847360540.

The spelling of 2900863891 in words is "two billion, nine hundred million, eight hundred sixty-three thousand, eight hundred ninety-one".