2549490397 has 2 divisors, whose sum is σ = 2549490398. Its totient is φ = 2549490396.

The previous prime is 2549490371. The next prime is 2549490451. The reversal of 2549490397 is 7930949452.

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., 2509408836 + 40081561 = 50094^2 + 6331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2549490397 - 2¹¹ = 2549488349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2549490337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1274745198 + 1274745199.

It is an arithmetic number, because the mean of its divisors is an integer number (1274745199).

Almost surely, 2^2549490397 is an apocalyptic number.

It is an amenable number.

2549490397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2549490397 is an equidigital number, since it uses as much as digits as its factorization.

2549490397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 52.

The square root of 2549490397 is about 50492.4786181071. The cubic root of 2549490397 is about 1366.1061930695.

The spelling of 2549490397 in words is "two billion, five hundred forty-nine million, four hundred ninety thousand, three hundred ninety-seven".