3104991 has 18 divisors (see below), whose sum is σ = 4647240. Its totient is φ = 1997640.

The previous prime is 3104963. The next prime is 3105007. The reversal of 3104991 is 1994013.

It is not a de Polignac number, because 3104991 - 2¹⁴ = 3088607 is a prime.

It is a super-2 number, since 2×3104991² = 19281938220162, which contains 22 as substring.

3104991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3104951) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8470 + ... + 8828.

It is an arithmetic number, because the mean of its divisors is an integer number (258180).

Almost surely, 2^3104991 is an apocalyptic number.

3104991 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

3104991 is a deficient number, since it is larger than the sum of its proper divisors (1542249).

3104991 is a wasteful number, since it uses less digits than its factorization.

3104991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 3104991 is about 1762.0984648992. The cubic root of 3104991 is about 145.8881829778. Note that the first 3 decimals are identical.

It can be divided in two parts, 3104 and 991, that added together give a triangular number (4095 = T₉₀).

The spelling of 3104991 in words is "three million, one hundred four thousand, nine hundred ninety-one".