45123439 has 4 divisors (see below), whose sum is σ = 45312480. Its totient is φ = 44934400.

The previous prime is 45123437. The next prime is 45123443. The reversal of 45123439 is 93432154.

45123439 = 310² + 311² + ... + 548².

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93432154 = 2 ⋅46716077.

It is a cyclic number.

It is not a de Polignac number, because 45123439 - 2¹ = 45123437 is a prime.

It is a super-2 number, since 2×45123439² = 4072249494373442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45123439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45123433) 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, 94162 + ... + 94639.

It is an arithmetic number, because the mean of its divisors is an integer number (11328120).

Almost surely, 2^45123439 is an apocalyptic number.

45123439 is a deficient number, since it is larger than the sum of its proper divisors (189041).

45123439 is a wasteful number, since it uses less digits than its factorization.

45123439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189040.

The product of its digits is 12960, while the sum is 31.

The square root of 45123439 is about 6717.3982314584. The cubic root of 45123439 is about 356.0142626740.

The spelling of 45123439 in words is "forty-five million, one hundred twenty-three thousand, four hundred thirty-nine".