2490782981 has 4 divisors (see below), whose sum is σ = 2492661312. Its totient is φ = 2488904652.

The previous prime is 2490782969. The next prime is 2490783011. The reversal of 2490782981 is 1892870942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2490782981 - 2²² = 2486588677 is a prime.

It is a super-2 number, since 2×2490782981² = 12407999716878492722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2490782911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 937175 + ... + 939828.

It is an arithmetic number, because the mean of its divisors is an integer number (623165328).

Almost surely, 2^2490782981 is an apocalyptic number.

It is an amenable number.

2490782981 is a deficient number, since it is larger than the sum of its proper divisors (1878331).

2490782981 is a wasteful number, since it uses less digits than its factorization.

2490782981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1878330.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 2490782981 is about 49907.7446995955. The cubic root of 2490782981 is about 1355.5388317358.

The spelling of 2490782981 in words is "two billion, four hundred ninety million, seven hundred eighty-two thousand, nine hundred eighty-one".