2779391 has 8 divisors (see below), whose sum is σ = 2874960. Its totient is φ = 2685312.

The previous prime is 2779363. The next prime is 2779411. The reversal of 2779391 is 1939772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2779391 - 2⁶ = 2779327 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 (2779351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4391 + ... + 4983.

It is an arithmetic number, because the mean of its divisors is an integer number (359370).

2^2779391 is an apocalyptic number.

2779391 is a deficient number, since it is larger than the sum of its proper divisors (95569).

2779391 is a wasteful number, since it uses less digits than its factorization.

2779391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745.

The product of its digits is 23814, while the sum is 38.

The square root of 2779391 is about 1667.1505630866. The cubic root of 2779391 is about 140.5993185036.

The spelling of 2779391 in words is "two million, seven hundred seventy-nine thousand, three hundred ninety-one".