25690487 has 2 divisors, whose sum is σ = 25690488. Its totient is φ = 25690486.

The previous prime is 25690463. The next prime is 25690501. The reversal of 25690487 is 78409652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25690487 is a prime.

It is a super-2 number, since 2×25690487² = 1320002244594338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25690447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12845243 + 12845244.

It is an arithmetic number, because the mean of its divisors is an integer number (12845244).

Almost surely, 2^25690487 is an apocalyptic number.

25690487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25690487 is an equidigital number, since it uses as much as digits as its factorization.

25690487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 25690487 is about 5068.5784003012. The cubic root of 25690487 is about 295.0693583924.

The spelling of 25690487 in words is "twenty-five million, six hundred ninety thousand, four hundred eighty-seven".