2391885493 has 2 divisors, whose sum is σ = 2391885494. Its totient is φ = 2391885492.

The previous prime is 2391885491. The next prime is 2391885521. The reversal of 2391885493 is 3945881932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2298531249 + 93354244 = 47943^2 + 9662^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391885493 - 2¹ = 2391885491 is a prime.

It is a super-2 number, since 2×2391885493² = 11442232423247706098, which contains 22 as substring.

Together with 2391885491, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2391885493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391885491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195942746 + 1195942747.

It is an arithmetic number, because the mean of its divisors is an integer number (1195942747).

Almost surely, 2^2391885493 is an apocalyptic number.

It is an amenable number.

2391885493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391885493 is an equidigital number, since it uses as much as digits as its factorization.

2391885493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1866240, while the sum is 52.

The square root of 2391885493 is about 48906.9063936782. The cubic root of 2391885493 is about 1337.3552746191.

The spelling of 2391885493 in words is "two billion, three hundred ninety-one million, eight hundred eighty-five thousand, four hundred ninety-three".