2549878493 has 2 divisors, whose sum is σ = 2549878494. Its totient is φ = 2549878492.

The previous prime is 2549878483. The next prime is 2549878517. The reversal of 2549878493 is 3948789452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1855714084 + 694164409 = 43078^2 + 26347^2 .

It is a cyclic number.

It is not a de Polignac number, because 2549878493 - 2⁸ = 2549878237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2549878453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274939246 + 1274939247.

It is an arithmetic number, because the mean of its divisors is an integer number (1274939247).

Almost surely, 2^2549878493 is an apocalyptic number.

It is an amenable number.

2549878493 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549878493 is an equidigital number, since it uses as much as digits as its factorization.

2549878493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The square root of 2549878493 is about 50496.3215789032. The cubic root of 2549878493 is about 1366.1755080262.

The spelling of 2549878493 in words is "two billion, five hundred forty-nine million, eight hundred seventy-eight thousand, four hundred ninety-three".