25217873 has 2 divisors, whose sum is σ = 25217874. Its totient is φ = 25217872.

The previous prime is 25217861. The next prime is 25217879. The reversal of 25217873 is 37871252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13712209 + 11505664 = 3703^2 + 3392^2 .

It is a cyclic number.

It is not a de Polignac number, because 25217873 - 2⁶ = 25217809 is a prime.

It is a super-2 number, since 2×25217873² = 1271882237288258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25217879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12608936 + 12608937.

It is an arithmetic number, because the mean of its divisors is an integer number (12608937).

Almost surely, 2^25217873 is an apocalyptic number.

It is an amenable number.

25217873 is a deficient number, since it is larger than the sum of its proper divisors (1).

25217873 is an equidigital number, since it uses as much as digits as its factorization.

25217873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23520, while the sum is 35.

The square root of 25217873 is about 5021.7400370788. The cubic root of 25217873 is about 293.2487375142.

The spelling of 25217873 in words is "twenty-five million, two hundred seventeen thousand, eight hundred seventy-three".