2931780493 has 4 divisors (see below), whose sum is σ = 2973073248. Its totient is φ = 2890487740.

The previous prime is 2931780487. The next prime is 2931780547. The reversal of 2931780493 is 3940871392.

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 a de Polignac number, because none of the positive numbers 2^k-2931780493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2931780403) 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, 20646271 + ... + 20646412.

It is an arithmetic number, because the mean of its divisors is an integer number (743268312).

Almost surely, 2^2931780493 is an apocalyptic number.

It is an amenable number.

2931780493 is a deficient number, since it is larger than the sum of its proper divisors (41292755).

2931780493 is an equidigital number, since it uses as much as digits as its factorization.

2931780493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41292754.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 2931780493 is about 54145.9185257763. The cubic root of 2931780493 is about 1431.2334693005.

The spelling of 2931780493 in words is "two billion, nine hundred thirty-one million, seven hundred eighty thousand, four hundred ninety-three".