45312729 has 16 divisors (see below), whose sum is σ = 75325440. Its totient is φ = 23538960.

The previous prime is 45312719. The next prime is 45312763. The reversal of 45312729 is 92721354.

It is not a de Polignac number, because 45312729 - 2⁴ = 45312713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 45312729.

It is not an unprimeable number, because it can be changed into a prime (45312719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97849 + ... + 98310.

It is an arithmetic number, because the mean of its divisors is an integer number (4707840).

Almost surely, 2^45312729 is an apocalyptic number.

It is an amenable number.

45312729 is a deficient number, since it is larger than the sum of its proper divisors (30012711).

45312729 is a wasteful number, since it uses less digits than its factorization.

45312729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196180.

The product of its digits is 15120, while the sum is 33.

The square root of 45312729 is about 6731.4730185896. The cubic root of 45312729 is about 356.5113873618.

It can be divided in two parts, 4531 and 2729, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 45312729 in words is "forty-five million, three hundred twelve thousand, seven hundred twenty-nine".