25097381 has 2 divisors, whose sum is σ = 25097382. Its totient is φ = 25097380.

The previous prime is 25097357. The next prime is 25097399. The reversal of 25097381 is 18379052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 1136356 = 4895^2 + 1066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25097381 is a prime.

It is a super-2 number, since 2×25097381² = 1259757066118322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25097311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12548690 + 12548691.

It is an arithmetic number, because the mean of its divisors is an integer number (12548691).

Almost surely, 2^25097381 is an apocalyptic number.

It is an amenable number.

25097381 is a deficient number, since it is larger than the sum of its proper divisors (1).

25097381 is an equidigital number, since it uses as much as digits as its factorization.

25097381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 25097381 is about 5009.7286353654. The cubic root of 25097381 is about 292.7809402936.

The spelling of 25097381 in words is "twenty-five million, ninety-seven thousand, three hundred eighty-one".