25361899 has 2 divisors, whose sum is σ = 25361900. Its totient is φ = 25361898.

The previous prime is 25361887. The next prime is 25361927. The reversal of 25361899 is 99816352.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25361899 - 2¹⁷ = 25230827 is a prime.

It is not a weakly prime, because it can be changed into another prime (25367899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12680949 + 12680950.

It is an arithmetic number, because the mean of its divisors is an integer number (12680950).

Almost surely, 2^25361899 is an apocalyptic number.

25361899 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361899 is an equidigital number, since it uses as much as digits as its factorization.

25361899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 43.

The square root of 25361899 is about 5036.0598685877. The cubic root of 25361899 is about 293.8059519796.

The spelling of 25361899 in words is "twenty-five million, three hundred sixty-one thousand, eight hundred ninety-nine".