74744729 has 2 divisors, whose sum is σ = 74744730. Its totient is φ = 74744728.

The previous prime is 74744723. The next prime is 74744749. The reversal of 74744729 is 92744747.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65983129 + 8761600 = 8123^2 + 2960^2 .

It is a cyclic number.

It is not a de Polignac number, because 74744729 - 2⁸ = 74744473 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74744729.

It is not a weakly prime, because it can be changed into another prime (74744723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37372364 + 37372365.

It is an arithmetic number, because the mean of its divisors is an integer number (37372365).

Almost surely, 2^74744729 is an apocalyptic number.

It is an amenable number.

74744729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74744729 is an equidigital number, since it uses as much as digits as its factorization.

74744729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 44.

The square root of 74744729 is about 8645.5033977207. The cubic root of 74744729 is about 421.2373356881.

The spelling of 74744729 in words is "seventy-four million, seven hundred forty-four thousand, seven hundred twenty-nine".