25390091 has 8 divisors (see below), whose sum is σ = 26929824. Its totient is φ = 23886720.

The previous prime is 25390069. The next prime is 25390093. The reversal of 25390091 is 19009352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25390091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25390093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7646 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (3366228).

Almost surely, 2^25390091 is an apocalyptic number.

25390091 is a deficient number, since it is larger than the sum of its proper divisors (1539733).

25390091 is a wasteful number, since it uses less digits than its factorization.

25390091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18181.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 25390091 is about 5038.8581047694. The cubic root of 25390091 is about 293.9147754580.

The spelling of 25390091 in words is "twenty-five million, three hundred ninety thousand, ninety-one".