2497391639 has 2 divisors, whose sum is σ = 2497391640. Its totient is φ = 2497391638.

The previous prime is 2497391599. The next prime is 2497391717. The reversal of 2497391639 is 9361937942.

It is a happy number.

2497391639 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 is a cyclic number.

It is not a de Polignac number, because 2497391639 - 2⁸ = 2497391383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2497381639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248695819 + 1248695820.

It is an arithmetic number, because the mean of its divisors is an integer number (1248695820).

Almost surely, 2^2497391639 is an apocalyptic number.

2497391639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2497391639 is an equidigital number, since it uses as much as digits as its factorization.

2497391639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 53.

The square root of 2497391639 is about 49973.9095829014. The cubic root of 2497391639 is about 1356.7366319753.

The spelling of 2497391639 in words is "two billion, four hundred ninety-seven million, three hundred ninety-one thousand, six hundred thirty-nine".