45812729 has 4 divisors (see below), whose sum is σ = 46066020. Its totient is φ = 45559440.

The previous prime is 45812713. The next prime is 45812731. The reversal of 45812729 is 92721854.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92721854 = 2 ⋅46360927.

It can be written as a sum of positive squares in 2 ways, for example, as 24403600 + 21409129 = 4940^2 + 4627^2 .

It is a cyclic number.

It is not a de Polignac number, because 45812729 - 2⁴ = 45812713 is a prime.

It is a super-2 number, since 2×45812729² = 4197612276854882, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 45812692 and 45812701.

It is not an unprimeable number, because it can be changed into a prime (45812749) 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, 126374 + ... + 126735.

It is an arithmetic number, because the mean of its divisors is an integer number (11516505).

Almost surely, 2^45812729 is an apocalyptic number.

It is an amenable number.

45812729 is a deficient number, since it is larger than the sum of its proper divisors (253291).

45812729 is a wasteful number, since it uses less digits than its factorization.

45812729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253290.

The product of its digits is 40320, while the sum is 38.

The square root of 45812729 is about 6768.5101019353. The cubic root of 45812729 is about 357.8178931918.

The spelling of 45812729 in words is "forty-five million, eight hundred twelve thousand, seven hundred twenty-nine".