2891964251 has 6 divisors (see below), whose sum is σ = 3178770756. Its totient is φ = 2629058300.

The previous prime is 2891964247. The next prime is 2891964307. The reversal of 2891964251 is 1524691982.

It is a happy number.

It is not a de Polignac number, because 2891964251 - 2² = 2891964247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2891964196 and 2891964205.

It is not an unprimeable number, because it can be changed into a prime (2891964211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11950145 + ... + 11950386.

It is an arithmetic number, because the mean of its divisors is an integer number (529795126).

Almost surely, 2^2891964251 is an apocalyptic number.

2891964251 is a deficient number, since it is larger than the sum of its proper divisors (286806505).

2891964251 is a wasteful number, since it uses less digits than its factorization.

2891964251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23900553 (or 23900542 counting only the distinct ones).

The product of its digits is 311040, while the sum is 47.

The square root of 2891964251 is about 53776.9862580640. The cubic root of 2891964251 is about 1424.7247648993.

The spelling of 2891964251 in words is "two billion, eight hundred ninety-one million, nine hundred sixty-four thousand, two hundred fifty-one".