25699057 has 2 divisors, whose sum is σ = 25699058. Its totient is φ = 25699056.

The previous prime is 25699033. The next prime is 25699061. The reversal of 25699057 is 75099652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19368801 + 6330256 = 4401^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 25699057 - 2⁷ = 25698929 is a prime.

It is not a weakly prime, because it can be changed into another prime (25699007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12849528 + 12849529.

It is an arithmetic number, because the mean of its divisors is an integer number (12849529).

Almost surely, 2^25699057 is an apocalyptic number.

It is an amenable number.

25699057 is a deficient number, since it is larger than the sum of its proper divisors (1).

25699057 is an equidigital number, since it uses as much as digits as its factorization.

25699057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 25699057 is about 5069.4237345087. The cubic root of 25699057 is about 295.1021651309.

The spelling of 25699057 in words is "twenty-five million, six hundred ninety-nine thousand, fifty-seven".