25431493 has 2 divisors, whose sum is σ = 25431494. Its totient is φ = 25431492.

The previous prime is 25431457. The next prime is 25431499. The reversal of 25431493 is 39413452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16916769 + 8514724 = 4113^2 + 2918^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25431493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25431499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715746 + 12715747.

It is an arithmetic number, because the mean of its divisors is an integer number (12715747).

Almost surely, 2^25431493 is an apocalyptic number.

It is an amenable number.

25431493 is a deficient number, since it is larger than the sum of its proper divisors (1).

25431493 is an equidigital number, since it uses as much as digits as its factorization.

25431493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 31.

The square root of 25431493 is about 5042.9647034260. The cubic root of 25431493 is about 294.0744447203.

The spelling of 25431493 in words is "twenty-five million, four hundred thirty-one thousand, four hundred ninety-three".