2489731 has 4 divisors (see below), whose sum is σ = 2542752. Its totient is φ = 2436712.

The previous prime is 2489719. The next prime is 2489749. The reversal of 2489731 is 1379842.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1379842 = 2 ⋅689921.

It is a cyclic number.

It is not a de Polignac number, because 2489731 - 2⁷ = 2489603 is a prime.

It is a super-2 number, since 2×2489731² = 12397520904722, which contains 22 as substring.

It is a Duffinian number.

2489731 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2489761) 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 3 ways as a sum of consecutive naturals, for example, 26440 + ... + 26533.

It is an arithmetic number, because the mean of its divisors is an integer number (635688).

2^2489731 is an apocalyptic number.

2489731 is a deficient number, since it is larger than the sum of its proper divisors (53021).

2489731 is an equidigital number, since it uses as much as digits as its factorization.

2489731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53020.

The product of its digits is 12096, while the sum is 34.

The square root of 2489731 is about 1577.8881455921. Note that the first 3 decimals coincide. The cubic root of 2489731 is about 135.5347967804.

The spelling of 2489731 in words is "two million, four hundred eighty-nine thousand, seven hundred thirty-one".