2491983 has 36 divisors (see below), whose sum is σ = 4160520. Its totient is φ = 1428192.

The previous prime is 2491967. The next prime is 2492003. The reversal of 2491983 is 3891942.

It is not a de Polignac number, because 2491983 - 2⁴ = 2491967 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491903) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42208 + ... + 42266.

It is an arithmetic number, because the mean of its divisors is an integer number (115570).

2^2491983 is an apocalyptic number.

2491983 is a deficient number, since it is larger than the sum of its proper divisors (1668537).

2491983 is a wasteful number, since it uses less digits than its factorization.

2491983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116 (or 94 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 2491983 is about 1578.6015963504. The cubic root of 2491983 is about 135.5756489021.

The spelling of 2491983 in words is "two million, four hundred ninety-one thousand, nine hundred eighty-three".