73622729 has 4 divisors (see below), whose sum is σ = 73747476. Its totient is φ = 73497984.

The previous prime is 73622723. The next prime is 73622761. The reversal of 73622729 is 92722637.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25000000 + 48622729 = 5000^2 + 6973^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73622729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 73622692 and 73622701.

It is not an unprimeable number, because it can be changed into a prime (73622723) 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, 61484 + ... + 62669.

It is an arithmetic number, because the mean of its divisors is an integer number (18436869).

Almost surely, 2^73622729 is an apocalyptic number.

It is an amenable number.

73622729 is a deficient number, since it is larger than the sum of its proper divisors (124747).

73622729 is a wasteful number, since it uses less digits than its factorization.

73622729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124746.

The product of its digits is 63504, while the sum is 38.

The square root of 73622729 is about 8580.3688149170. The cubic root of 73622729 is about 419.1189562052.

The spelling of 73622729 in words is "seventy-three million, six hundred twenty-two thousand, seven hundred twenty-nine".