253906109 has 2 divisors, whose sum is σ = 253906110. Its totient is φ = 253906108.

The previous prime is 253906097. The next prime is 253906117. The reversal of 253906109 is 901609352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 232654009 + 21252100 = 15253^2 + 4610^2 .

It is a cyclic number.

It is not a de Polignac number, because 253906109 - 2⁸ = 253905853 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (253906189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126953054 + 126953055.

It is an arithmetic number, because the mean of its divisors is an integer number (126953055).

Almost surely, 2^253906109 is an apocalyptic number.

It is an amenable number.

253906109 is a deficient number, since it is larger than the sum of its proper divisors (1).

253906109 is an equidigital number, since it uses as much as digits as its factorization.

253906109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 253906109 is about 15934.4315555968. The cubic root of 253906109 is about 633.2245101728.

The spelling of 253906109 in words is "two hundred fifty-three million, nine hundred six thousand, one hundred nine".