915880249 has 2 divisors, whose sum is σ = 915880250. Its totient is φ = 915880248.

The previous prime is 915880247. The next prime is 915880261. The reversal of 915880249 is 942088519.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 533286649 + 382593600 = 23093^2 + 19560^2 .

It is a cyclic number.

It is not a de Polignac number, because 915880249 - 2¹ = 915880247 is a prime.

Together with 915880247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 915880199 and 915880208.

It is not a weakly prime, because it can be changed into another prime (915880241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 457940124 + 457940125.

It is an arithmetic number, because the mean of its divisors is an integer number (457940125).

Almost surely, 2^915880249 is an apocalyptic number.

It is an amenable number.

915880249 is a deficient number, since it is larger than the sum of its proper divisors (1).

915880249 is an equidigital number, since it uses as much as digits as its factorization.

915880249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 915880249 is about 30263.5134939749. The cubic root of 915880249 is about 971.1349060913.

The spelling of 915880249 in words is "nine hundred fifteen million, eight hundred eighty thousand, two hundred forty-nine".