2391918271 has 2 divisors, whose sum is σ = 2391918272. Its totient is φ = 2391918270.

The previous prime is 2391918257. The next prime is 2391918283. The reversal of 2391918271 is 1728191932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2391918271 - 2³¹ = 244434623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391918211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195959135 + 1195959136.

It is an arithmetic number, because the mean of its divisors is an integer number (1195959136).

Almost surely, 2^2391918271 is an apocalyptic number.

2391918271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391918271 is an equidigital number, since it uses as much as digits as its factorization.

2391918271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 43.

The square root of 2391918271 is about 48907.2414985756. The cubic root of 2391918271 is about 1337.3613835557.

The spelling of 2391918271 in words is "two billion, three hundred ninety-one million, nine hundred eighteen thousand, two hundred seventy-one".