74261609 has 2 divisors, whose sum is σ = 74261610. Its totient is φ = 74261608.

The previous prime is 74261597. The next prime is 74261611. The reversal of 74261609 is 90616247.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74011609 + 250000 = 8603^2 + 500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74261609 is a prime.

Together with 74261611, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74261309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37130804 + 37130805.

It is an arithmetic number, because the mean of its divisors is an integer number (37130805).

Almost surely, 2^74261609 is an apocalyptic number.

It is an amenable number.

74261609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74261609 is an equidigital number, since it uses as much as digits as its factorization.

74261609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 74261609 is about 8617.5175659815. The cubic root of 74261609 is about 420.3278034228.

The spelling of 74261609 in words is "seventy-four million, two hundred sixty-one thousand, six hundred nine".