74986729 has 2 divisors, whose sum is σ = 74986730. Its totient is φ = 74986728.

The previous prime is 74986727. The next prime is 74986733. The reversal of 74986729 is 92768947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47403225 + 27583504 = 6885^2 + 5252^2 .

It is an emirp because it is prime and its reverse (92768947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74986729 - 2¹ = 74986727 is a prime.

It is a super-2 number, since 2×74986729² = 11246019052238882, which contains 22 as substring.

Together with 74986727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (74986727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37493364 + 37493365.

It is an arithmetic number, because the mean of its divisors is an integer number (37493365).

Almost surely, 2^74986729 is an apocalyptic number.

It is an amenable number.

74986729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74986729 is an equidigital number, since it uses as much as digits as its factorization.

74986729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 52.

The square root of 74986729 is about 8659.4878024049. The cubic root of 74986729 is about 421.6914574172.

It can be divided in two parts, 749 and 86729, that added together give a palindrome (87478).

The spelling of 74986729 in words is "seventy-four million, nine hundred eighty-six thousand, seven hundred twenty-nine".