253878617 has 2 divisors, whose sum is σ = 253878618. Its totient is φ = 253878616.

The previous prime is 253878403. The next prime is 253878619. The reversal of 253878617 is 716878352.

It is a happy number.

253878617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169624576 + 84254041 = 13024^2 + 9179^2 .

It is a cyclic number.

It is not a de Polignac number, because 253878617 - 2¹² = 253874521 is a prime.

It is a super-3 number, since 3×253878617³ (a number of 26 digits) contains 333 as substring.

Together with 253878619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (253878619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126939308 + 126939309.

It is an arithmetic number, because the mean of its divisors is an integer number (126939309).

Almost surely, 2^253878617 is an apocalyptic number.

It is an amenable number.

253878617 is a deficient number, since it is larger than the sum of its proper divisors (1).

253878617 is an equidigital number, since it uses as much as digits as its factorization.

253878617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 253878617 is about 15933.5688720387. The cubic root of 253878617 is about 633.2016549572.

The spelling of 253878617 in words is "two hundred fifty-three million, eight hundred seventy-eight thousand, six hundred seventeen".