2951879891 has 4 divisors (see below), whose sum is σ = 3007575792. Its totient is φ = 2896183992.

The previous prime is 2951879873. The next prime is 2951879897. The reversal of 2951879891 is 1989781592.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2951879891 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2951879891.

It is not an unprimeable number, because it can be changed into a prime (2951879897) 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, 27847871 + ... + 27847976.

It is an arithmetic number, because the mean of its divisors is an integer number (751893948).

Almost surely, 2^2951879891 is an apocalyptic number.

2951879891 is a deficient number, since it is larger than the sum of its proper divisors (55695901).

2951879891 is an equidigital number, since it uses as much as digits as its factorization.

2951879891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55695900.

The product of its digits is 3265920, while the sum is 59.

The square root of 2951879891 is about 54331.2054992340. The cubic root of 2951879891 is about 1434.4967242092.

The spelling of 2951879891 in words is "two billion, nine hundred fifty-one million, eight hundred seventy-nine thousand, eight hundred ninety-one".