25909091 has 8 divisors (see below), whose sum is σ = 28551600. Its totient is φ = 23359392.

The previous prime is 25909073. The next prime is 25909097. The reversal of 25909091 is 19090952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25909091 - 2¹⁰ = 25908067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25909097) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22616 + ... + 23733.

It is an arithmetic number, because the mean of its divisors is an integer number (3568950).

Almost surely, 2^25909091 is an apocalyptic number.

25909091 is a deficient number, since it is larger than the sum of its proper divisors (2642509).

25909091 is a wasteful number, since it uses less digits than its factorization.

25909091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46405.

The product of its (nonzero) digits is 7290, while the sum is 35.

The square root of 25909091 is about 5090.0973468098. The cubic root of 25909091 is about 295.9039247179.

The spelling of 25909091 in words is "twenty-five million, nine hundred nine thousand, ninety-one".