2499813 has 6 divisors (see below), whose sum is σ = 3610854. Its totient is φ = 1666536.

The previous prime is 2499803. The next prime is 2499821. The reversal of 2499813 is 3189942.

It can be written as a sum of positive squares in only one way, i.e., 1695204 + 804609 = 1302^2 + 897^2 .

It is not a de Polignac number, because 2499813 - 2⁵ = 2499781 is a prime.

It is a Curzon number.

2499813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2499803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138870 + ... + 138887.

It is an arithmetic number, because the mean of its divisors is an integer number (601809).

2^2499813 is an apocalyptic number.

It is an amenable number.

2499813 is a deficient number, since it is larger than the sum of its proper divisors (1111041).

2499813 is a wasteful number, since it uses less digits than its factorization.

2499813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277763 (or 277760 counting only the distinct ones).

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

The square root of 2499813 is about 1581.0796943861. The cubic root of 2499813 is about 135.7174967714.

The spelling of 2499813 in words is "two million, four hundred ninety-nine thousand, eight hundred thirteen".