2431897649 has 2 divisors, whose sum is σ = 2431897650. Its totient is φ = 2431897648.

The previous prime is 2431897619. The next prime is 2431897669. The reversal of 2431897649 is 9467981342.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1552360000 + 879537649 = 39400^2 + 29657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2431897649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2431897649.

It is not a weakly prime, because it can be changed into another prime (2431897619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1215948824 + 1215948825.

It is an arithmetic number, because the mean of its divisors is an integer number (1215948825).

Almost surely, 2^2431897649 is an apocalyptic number.

It is an amenable number.

2431897649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431897649 is an equidigital number, since it uses as much as digits as its factorization.

2431897649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 53.

The square root of 2431897649 is about 49314.2742925413. The cubic root of 2431897649 is about 1344.7712972387.

The spelling of 2431897649 in words is "two billion, four hundred thirty-one million, eight hundred ninety-seven thousand, six hundred forty-nine".