74435729 has 2 divisors, whose sum is σ = 74435730. Its totient is φ = 74435728.

The previous prime is 74435723. The next prime is 74435821. The reversal of 74435729 is 92753447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66455104 + 7980625 = 8152^2 + 2825^2 .

It is a cyclic number.

It is not a de Polignac number, because 74435729 - 2¹² = 74431633 is a prime.

It is a super-2 number, since 2×74435729² = 11081355503522882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74435723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37217864 + 37217865.

It is an arithmetic number, because the mean of its divisors is an integer number (37217865).

Almost surely, 2^74435729 is an apocalyptic number.

It is an amenable number.

74435729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74435729 is an equidigital number, since it uses as much as digits as its factorization.

74435729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 41.

The square root of 74435729 is about 8627.6143284224. The cubic root of 74435729 is about 420.6560589509.

The spelling of 74435729 in words is "seventy-four million, four hundred thirty-five thousand, seven hundred twenty-nine".