45939213 has 6 divisors (see below), whose sum is σ = 66356654. Its totient is φ = 30626136.

The previous prime is 45939209. The next prime is 45939217. The reversal of 45939213 is 31293954.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (45939209) and next prime (45939217).

It can be written as a sum of positive squares in only one way, i.e., 43917129 + 2022084 = 6627^2 + 1422^2 .

It is not a de Polignac number, because 45939213 - 2² = 45939209 is a prime.

It is a super-2 number, since 2×45939213² = 4220822582118738, 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 (45939217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2552170 + ... + 2552187.

Almost surely, 2^45939213 is an apocalyptic number.

It is an amenable number.

45939213 is a deficient number, since it is larger than the sum of its proper divisors (20417441).

45939213 is a wasteful number, since it uses less digits than its factorization.

45939213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104363 (or 5104360 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 45939213 is about 6777.8472245987. The cubic root of 45939213 is about 358.1468894636.

The spelling of 45939213 in words is "forty-five million, nine hundred thirty-nine thousand, two hundred thirteen".