3078991 has 4 divisors (see below), whose sum is σ = 3096184. Its totient is φ = 3061800.

The previous prime is 3078983. The next prime is 3078997. The reversal of 3078991 is 1998703.

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

It is a cyclic number.

It is not a de Polignac number, because 3078991 - 2³ = 3078983 is a prime.

It is a Duffinian number.

3078991 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3078991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3078997) 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, 8325 + ... + 8686.

It is an arithmetic number, because the mean of its divisors is an integer number (774046).

Almost surely, 2^3078991 is an apocalyptic number.

3078991 is a deficient number, since it is larger than the sum of its proper divisors (17193).

3078991 is a wasteful number, since it uses less digits than its factorization.

3078991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17192.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 3078991 is about 1754.7053883772. The cubic root of 3078991 is about 145.4798372331.

The spelling of 3078991 in words is "three million, seventy-eight thousand, nine hundred ninety-one".