25398973 has 2 divisors, whose sum is σ = 25398974. Its totient is φ = 25398972.

The previous prime is 25398959. The next prime is 25398979. The reversal of 25398973 is 37989352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24226084 + 1172889 = 4922^2 + 1083^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25398973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25398979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12699486 + 12699487.

It is an arithmetic number, because the mean of its divisors is an integer number (12699487).

Almost surely, 2^25398973 is an apocalyptic number.

It is an amenable number.

25398973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25398973 is an equidigital number, since it uses as much as digits as its factorization.

25398973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 25398973 is about 5039.7393781822. The cubic root of 25398973 is about 293.9490440326.

The spelling of 25398973 in words is "twenty-five million, three hundred ninety-eight thousand, nine hundred seventy-three".