2780093 has 4 divisors (see below), whose sum is σ = 2811420. Its totient is φ = 2748768.

The previous prime is 2780083. The next prime is 2780101. The reversal of 2780093 is 3900872.

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 1530169 + 1249924 = 1237^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2780093 - 2⁴ = 2780077 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 (2780053) 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, 15530 + ... + 15707.

It is an arithmetic number, because the mean of its divisors is an integer number (702855).

2^2780093 is an apocalyptic number.

It is an amenable number.

2780093 is a deficient number, since it is larger than the sum of its proper divisors (31327).

2780093 is an equidigital number, since it uses as much as digits as its factorization.

2780093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31326.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 2780093 is about 1667.3610886668. The cubic root of 2780093 is about 140.6111547192.

The spelling of 2780093 in words is "two million, seven hundred eighty thousand, ninety-three".