25613173 has 2 divisors, whose sum is σ = 25613174. Its totient is φ = 25613172.

The previous prime is 25613149. The next prime is 25613201. The reversal of 25613173 is 37131652.

It is an a-pointer prime, because the next prime (25613201) can be obtained adding 25613173 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22867524 + 2745649 = 4782^2 + 1657^2 .

It is a cyclic number.

It is not a de Polignac number, because 25613173 - 2²¹ = 23516021 is a prime.

It is a super-2 number, since 2×25613173² = 1312069262255858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25610173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806586 + 12806587.

It is an arithmetic number, because the mean of its divisors is an integer number (12806587).

Almost surely, 2^25613173 is an apocalyptic number.

It is an amenable number.

25613173 is a deficient number, since it is larger than the sum of its proper divisors (1).

25613173 is an equidigital number, since it uses as much as digits as its factorization.

25613173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 25613173 is about 5060.9458602123. The cubic root of 25613173 is about 294.7730630426.

The spelling of 25613173 in words is "twenty-five million, six hundred thirteen thousand, one hundred seventy-three".