2391504421 has 2 divisors, whose sum is σ = 2391504422. Its totient is φ = 2391504420.

The previous prime is 2391504403. The next prime is 2391504443. The reversal of 2391504421 is 1244051932.

2391504421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2259576225 + 131928196 = 47535^2 + 11486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2391504421 - 2²⁹ = 1854633509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2391504491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195752210 + 1195752211.

It is an arithmetic number, because the mean of its divisors is an integer number (1195752211).

Almost surely, 2^2391504421 is an apocalyptic number.

It is an amenable number.

2391504421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391504421 is an equidigital number, since it uses as much as digits as its factorization.

2391504421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 2391504421 is about 48903.0103470124. The cubic root of 2391504421 is about 1337.2842489620.

The spelling of 2391504421 in words is "two billion, three hundred ninety-one million, five hundred four thousand, four hundred twenty-one".