2779452391 has 2 divisors, whose sum is σ = 2779452392. Its totient is φ = 2779452390.

The previous prime is 2779452331. The next prime is 2779452413. The reversal of 2779452391 is 1932549772.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2779452391 - 2²¹ = 2777355239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2779452331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1389726195 + 1389726196.

It is an arithmetic number, because the mean of its divisors is an integer number (1389726196).

Almost surely, 2^2779452391 is an apocalyptic number.

2779452391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2779452391 is an equidigital number, since it uses as much as digits as its factorization.

2779452391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 2779452391 is about 52720.5120517622. The cubic root of 2779452391 is about 1406.0035367876.

The spelling of 2779452391 in words is "two billion, seven hundred seventy-nine million, four hundred fifty-two thousand, three hundred ninety-one".