25470917 has 2 divisors, whose sum is σ = 25470918. Its totient is φ = 25470916.

The previous prime is 25470889. The next prime is 25470919. The reversal of 25470917 is 71907452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25060036 + 410881 = 5006^2 + 641^2 .

It is a cyclic number.

It is not a de Polignac number, because 25470917 - 2⁶ = 25470853 is a prime.

It is a super-2 number, since 2×25470917² = 1297535225641778, which contains 22 as substring.

Together with 25470919, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25470919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12735458 + 12735459.

It is an arithmetic number, because the mean of its divisors is an integer number (12735459).

Almost surely, 2^25470917 is an apocalyptic number.

It is an amenable number.

25470917 is a deficient number, since it is larger than the sum of its proper divisors (1).

25470917 is an equidigital number, since it uses as much as digits as its factorization.

25470917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 25470917 is about 5046.8720015471. The cubic root of 25470917 is about 294.2263247174.

The spelling of 25470917 in words is "twenty-five million, four hundred seventy thousand, nine hundred seventeen".