25520693 has 4 divisors (see below), whose sum is σ = 27840768. Its totient is φ = 23200620.

The previous prime is 25520683. The next prime is 25520699. The reversal of 25520693 is 39602552.

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 25520693 - 2⁸ = 25520437 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 (25520699) 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, 1160021 + ... + 1160042.

It is an arithmetic number, because the mean of its divisors is an integer number (6960192).

Almost surely, 2^25520693 is an apocalyptic number.

It is an amenable number.

25520693 is a deficient number, since it is larger than the sum of its proper divisors (2320075).

25520693 is a wasteful number, since it uses less digits than its factorization.

25520693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320074.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 25520693 is about 5051.8009659922. The cubic root of 25520693 is about 294.4178618566.

The spelling of 25520693 in words is "twenty-five million, five hundred twenty thousand, six hundred ninety-three".