3133649 has 4 divisors (see below), whose sum is σ = 3140964. Its totient is φ = 3126336.

The previous prime is 3133643. The next prime is 3133673. The reversal of 3133649 is 9463313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9463313 = 1033 ⋅9161.

It can be written as a sum of positive squares in 2 ways, for example, as 1117249 + 2016400 = 1057^2 + 1420^2 .

It is a cyclic number.

It is not a de Polignac number, because 3133649 - 2⁴ = 3133633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3133643) 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, 2972 + ... + 3885.

It is an arithmetic number, because the mean of its divisors is an integer number (785241).

Almost surely, 2^3133649 is an apocalyptic number.

It is an amenable number.

3133649 is a deficient number, since it is larger than the sum of its proper divisors (7315).

3133649 is an equidigital number, since it uses as much as digits as its factorization.

3133649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7314.

The product of its digits is 5832, while the sum is 29.

The square root of 3133649 is about 1770.2115692764. The cubic root of 3133649 is about 146.3356417578.

The spelling of 3133649 in words is "three million, one hundred thirty-three thousand, six hundred forty-nine".