2780094997 has 4 divisors (see below), whose sum is σ = 2787430720. Its totient is φ = 2772759276.

The previous prime is 2780094959. The next prime is 2780095007. The reversal of 2780094997 is 7994900872.

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 2780094997 - 2¹¹ = 2780092949 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 (2780094907) 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, 3667293 + ... + 3668050.

It is an arithmetic number, because the mean of its divisors is an integer number (696857680).

Almost surely, 2^2780094997 is an apocalyptic number.

It is an amenable number.

2780094997 is a deficient number, since it is larger than the sum of its proper divisors (7335723).

2780094997 is an equidigital number, since it uses as much as digits as its factorization.

2780094997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335722.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The square root of 2780094997 is about 52726.6061585610. The cubic root of 2780094997 is about 1406.1118838720. Note that the first 3 decimals are identical.

The spelling of 2780094997 in words is "two billion, seven hundred eighty million, ninety-four thousand, nine hundred ninety-seven".