25090091 has 8 divisors (see below), whose sum is σ = 27059424. Its totient is φ = 23126400.

The previous prime is 25090069. The next prime is 25090097. The reversal of 25090091 is 19009052.

It is a happy number.

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 25090091 - 2¹⁸ = 24827947 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25090091.

It is not an unprimeable number, because it can be changed into a prime (25090097) 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, 14810 + ... + 16416.

It is an arithmetic number, because the mean of its divisors is an integer number (3382428).

Almost surely, 2^25090091 is an apocalyptic number.

25090091 is a deficient number, since it is larger than the sum of its proper divisors (1969333).

25090091 is a wasteful number, since it uses less digits than its factorization.

25090091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 25090091 is about 5009.0009982031. Note that the first 3 decimals coincide. The cubic root of 25090091 is about 292.7525896629.

The spelling of 25090091 in words is "twenty-five million, ninety thousand, ninety-one".