253099909 has 2 divisors, whose sum is σ = 253099910. Its totient is φ = 253099908.

The previous prime is 253099879. The next prime is 253099921. The reversal of 253099909 is 909990352.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231709284 + 21390625 = 15222^2 + 4625^2 .

It is a cyclic number.

It is not a de Polignac number, because 253099909 - 2⁹ = 253099397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253099939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126549954 + 126549955.

It is an arithmetic number, because the mean of its divisors is an integer number (126549955).

Almost surely, 2^253099909 is an apocalyptic number.

It is an amenable number.

253099909 is a deficient number, since it is larger than the sum of its proper divisors (1).

253099909 is an equidigital number, since it uses as much as digits as its factorization.

253099909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 46.

The square root of 253099909 is about 15909.1140231001. The cubic root of 253099909 is about 632.5535969829.

The spelling of 253099909 in words is "two hundred fifty-three million, ninety-nine thousand, nine hundred nine".