74020729 has 4 divisors (see below), whose sum is σ = 75125584. Its totient is φ = 72915876.

The previous prime is 74020691. The next prime is 74020741. The reversal of 74020729 is 92702047.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74020729 - 2¹³ = 74012537 is a prime.

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 74020729.

It is not an unprimeable number, because it can be changed into a prime (74020769) 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, 552327 + ... + 552460.

It is an arithmetic number, because the mean of its divisors is an integer number (18781396).

Almost surely, 2^74020729 is an apocalyptic number.

It is an amenable number.

74020729 is a deficient number, since it is larger than the sum of its proper divisors (1104855).

74020729 is a wasteful number, since it uses less digits than its factorization.

74020729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104854.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 74020729 is about 8603.5300313302. The cubic root of 74020729 is about 419.8728432149.

The spelling of 74020729 in words is "seventy-four million, twenty thousand, seven hundred twenty-nine".