2497940657 has 2 divisors, whose sum is σ = 2497940658. Its totient is φ = 2497940656.

The previous prime is 2497940651. The next prime is 2497940671. The reversal of 2497940657 is 7560497942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2129914801 + 368025856 = 46151^2 + 19184^2 .

It is a cyclic number.

It is not a de Polignac number, because 2497940657 - 2²⁰ = 2496892081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2497940599 and 2497940608.

It is not a weakly prime, because it can be changed into another prime (2497940651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248970328 + 1248970329.

It is an arithmetic number, because the mean of its divisors is an integer number (1248970329).

Almost surely, 2^2497940657 is an apocalyptic number.

It is an amenable number.

2497940657 is a deficient number, since it is larger than the sum of its proper divisors (1).

2497940657 is an equidigital number, since it uses as much as digits as its factorization.

2497940657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3810240, while the sum is 53.

The square root of 2497940657 is about 49979.4023273588. The cubic root of 2497940657 is about 1356.8360447978.

The spelling of 2497940657 in words is "two billion, four hundred ninety-seven million, nine hundred forty thousand, six hundred fifty-seven".