2453991 has 8 divisors (see below), whose sum is σ = 3377664. Its totient is φ = 1583160.

The previous prime is 2453923. The next prime is 2453999. The reversal of 2453991 is 1993542.

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

It is not a de Polignac number, because 2453991 - 2¹³ = 2445799 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2453999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13101 + ... + 13286.

It is an arithmetic number, because the mean of its divisors is an integer number (422208).

2^2453991 is an apocalyptic number.

2453991 is a deficient number, since it is larger than the sum of its proper divisors (923673).

2453991 is a wasteful number, since it uses less digits than its factorization.

2453991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26421.

The product of its digits is 9720, while the sum is 33.

The square root of 2453991 is about 1566.5219436701. The cubic root of 2453991 is about 134.8831361765.

The spelling of 2453991 in words is "two million, four hundred fifty-three thousand, nine hundred ninety-one".