2790387493 has 4 divisors (see below), whose sum is σ = 2790532780. Its totient is φ = 2790242208.

The previous prime is 2790387491. The next prime is 2790387521. The reversal of 2790387493 is 3947830972.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2712118084 + 78269409 = 52078^2 + 8847^2 .

It is a cyclic number.

It is not a de Polignac number, because 2790387493 - 2¹ = 2790387491 is a prime.

It is a super-2 number, since 2×2790387493² = 15572524722181650098, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2790387493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2790387491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38478 + ... + 84031.

It is an arithmetic number, because the mean of its divisors is an integer number (697633195).

Almost surely, 2^2790387493 is an apocalyptic number.

It is an amenable number.

2790387493 is a deficient number, since it is larger than the sum of its proper divisors (145287).

2790387493 is a wasteful number, since it uses less digits than its factorization.

2790387493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145286.

The product of its (nonzero) digits is 2286144, while the sum is 52.

The square root of 2790387493 is about 52824.1184782103. The cubic root of 2790387493 is about 1407.8449874341.

The spelling of 2790387493 in words is "two billion, seven hundred ninety million, three hundred eighty-seven thousand, four hundred ninety-three".