74776729 has 2 divisors, whose sum is σ = 74776730. Its totient is φ = 74776728.

The previous prime is 74776721. The next prime is 74776783. The reversal of 74776729 is 92767747.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58936329 + 15840400 = 7677^2 + 3980^2 .

It is a cyclic number.

It is not a de Polignac number, because 74776729 - 2³ = 74776721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74776721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37388364 + 37388365.

It is an arithmetic number, because the mean of its divisors is an integer number (37388365).

Almost surely, 2^74776729 is an apocalyptic number.

It is an amenable number.

74776729 is a deficient number, since it is larger than the sum of its proper divisors (1).

74776729 is an equidigital number, since it uses as much as digits as its factorization.

74776729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1037232, while the sum is 49.

The square root of 74776729 is about 8647.3538727174. The cubic root of 74776729 is about 421.2974410259.

The spelling of 74776729 in words is "seventy-four million, seven hundred seventy-six thousand, seven hundred twenty-nine".