2749631 has 4 divisors (see below), whose sum is σ = 2911392. Its totient is φ = 2587872.

The previous prime is 2749609. The next prime is 2749639. The reversal of 2749631 is 1369472.

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 2749631 - 2⁶ = 2749567 is a prime.

It is a super-2 number, since 2×2749631² = 15120941272322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2749639) 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, 80855 + ... + 80888.

It is an arithmetic number, because the mean of its divisors is an integer number (727848).

2^2749631 is an apocalyptic number.

2749631 is a deficient number, since it is larger than the sum of its proper divisors (161761).

2749631 is a wasteful number, since it uses less digits than its factorization.

2749631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161760.

The product of its digits is 9072, while the sum is 32.

The square root of 2749631 is about 1658.2011337591. The cubic root of 2749631 is about 140.0956998736.

The spelling of 2749631 in words is "two million, seven hundred forty-nine thousand, six hundred thirty-one".