25651943 has 2 divisors, whose sum is σ = 25651944. Its totient is φ = 25651942.

The previous prime is 25651939. The next prime is 25651987. The reversal of 25651943 is 34915652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25651943 - 2² = 25651939 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25651933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12825971 + 12825972.

It is an arithmetic number, because the mean of its divisors is an integer number (12825972).

Almost surely, 2^25651943 is an apocalyptic number.

25651943 is a deficient number, since it is larger than the sum of its proper divisors (1).

25651943 is an equidigital number, since it uses as much as digits as its factorization.

25651943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 25651943 is about 5064.7747235193. The cubic root of 25651943 is about 294.9217181927.

The spelling of 25651943 in words is "twenty-five million, six hundred fifty-one thousand, nine hundred forty-three".