74702209 has 2 divisors, whose sum is σ = 74702210. Its totient is φ = 74702208.

The previous prime is 74702189. The next prime is 74702227. The reversal of 74702209 is 90220747.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68807025 + 5895184 = 8295^2 + 2428^2 .

It is an emirp because it is prime and its reverse (90220747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74702209 - 2²³ = 66313601 is a prime.

It is not a weakly prime, because it can be changed into another prime (74702009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37351104 + 37351105.

It is an arithmetic number, because the mean of its divisors is an integer number (37351105).

Almost surely, 2^74702209 is an apocalyptic number.

It is an amenable number.

74702209 is a deficient number, since it is larger than the sum of its proper divisors (1).

74702209 is an equidigital number, since it uses as much as digits as its factorization.

74702209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 74702209 is about 8643.0439661036. The cubic root of 74702209 is about 421.1574441730.

The spelling of 74702209 in words is "seventy-four million, seven hundred two thousand, two hundred nine".