25263109 has 4 divisors (see below), whose sum is σ = 26078080. Its totient is φ = 24448140.

The previous prime is 25263107. The next prime is 25263113. The reversal of 25263109 is 90136252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25263109 - 2¹ = 25263107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25263107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407439 + ... + 407500.

It is an arithmetic number, because the mean of its divisors is an integer number (6519520).

Almost surely, 2^25263109 is an apocalyptic number.

It is an amenable number.

25263109 is a deficient number, since it is larger than the sum of its proper divisors (814971).

25263109 is an equidigital number, since it uses as much as digits as its factorization.

25263109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814970.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 25263109 is about 5026.2420355570. The cubic root of 25263109 is about 293.4239766648.

The spelling of 25263109 in words is "twenty-five million, two hundred sixty-three thousand, one hundred nine".