74540779 has 2 divisors, whose sum is σ = 74540780. Its totient is φ = 74540778.

The previous prime is 74540657. The next prime is 74540797. The reversal of 74540779 is 97704547.

Together with next prime (74540797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74540779 - 2⁷ = 74540651 is a prime.

It is not a weakly prime, because it can be changed into another prime (74540579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37270389 + 37270390.

It is an arithmetic number, because the mean of its divisors is an integer number (37270390).

Almost surely, 2^74540779 is an apocalyptic number.

74540779 is a deficient number, since it is larger than the sum of its proper divisors (1).

74540779 is an equidigital number, since it uses as much as digits as its factorization.

74540779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 246960, while the sum is 43.

The square root of 74540779 is about 8633.7001916907. The cubic root of 74540779 is about 420.8538544078.

The spelling of 74540779 in words is "seventy-four million, five hundred forty thousand, seven hundred seventy-nine".