2390991 has 8 divisors (see below), whose sum is σ = 3202944. Its totient is φ = 1586520.

The previous prime is 2390987. The next prime is 2391001. The reversal of 2390991 is 1990932.

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

It is not a de Polignac number, because 2390991 - 2² = 2390987 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2390911) 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, 1075 + ... + 2436.

It is an arithmetic number, because the mean of its divisors is an integer number (400368).

2^2390991 is an apocalyptic number.

2390991 is a deficient number, since it is larger than the sum of its proper divisors (811953).

2390991 is a wasteful number, since it uses less digits than its factorization.

2390991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 2390991 is about 1546.2829624619. The cubic root of 2390991 is about 133.7188543660.

The spelling of 2390991 in words is "two million, three hundred ninety thousand, nine hundred ninety-one".