74740069 has 2 divisors, whose sum is σ = 74740070. Its totient is φ = 74740068.

The previous prime is 74740031. The next prime is 74740073. The reversal of 74740069 is 96004747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 263169 = 8630^2 + 513^2 .

It is an emirp because it is prime and its reverse (96004747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74740069 - 2⁹ = 74739557 is a prime.

It is a super-2 number, since 2×74740069² = 11172155828249522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74740009) 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, 37370034 + 37370035.

It is an arithmetic number, because the mean of its divisors is an integer number (37370035).

Almost surely, 2^74740069 is an apocalyptic number.

It is an amenable number.

74740069 is a deficient number, since it is larger than the sum of its proper divisors (1).

74740069 is an equidigital number, since it uses as much as digits as its factorization.

74740069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 74740069 is about 8645.2338892594. The cubic root of 74740069 is about 421.2285814174.

The spelling of 74740069 in words is "seventy-four million, seven hundred forty thousand, sixty-nine".