72740629 has 4 divisors (see below), whose sum is σ = 78336076. Its totient is φ = 67145184.

The previous prime is 72740621. The next prime is 72740639. The reversal of 72740629 is 92604727.

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 47238129 + 25502500 = 6873^2 + 5050^2 .

It is a cyclic number.

It is not a de Polignac number, because 72740629 - 2³ = 72740621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72740621) 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, 2797704 + ... + 2797729.

It is an arithmetic number, because the mean of its divisors is an integer number (19584019).

Almost surely, 2^72740629 is an apocalyptic number.

It is an amenable number.

72740629 is a deficient number, since it is larger than the sum of its proper divisors (5595447).

72740629 is a wasteful number, since it uses less digits than its factorization.

72740629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595446.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 72740629 is about 8528.8116991759. The cubic root of 72740629 is about 417.4383553672.

The spelling of 72740629 in words is "seventy-two million, seven hundred forty thousand, six hundred twenty-nine".