74471609 has 2 divisors, whose sum is σ = 74471610. Its totient is φ = 74471608.

The previous prime is 74471599. The next prime is 74471647. The reversal of 74471609 is 90617447.

It is an a-pointer prime, because the next prime (74471647) can be obtained adding 74471609 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67289209 + 7182400 = 8203^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 74471609 - 2¹² = 74467513 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74471689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37235804 + 37235805.

It is an arithmetic number, because the mean of its divisors is an integer number (37235805).

Almost surely, 2^74471609 is an apocalyptic number.

It is an amenable number.

74471609 is a deficient number, since it is larger than the sum of its proper divisors (1).

74471609 is an equidigital number, since it uses as much as digits as its factorization.

74471609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 74471609 is about 8629.6934476261. The cubic root of 74471609 is about 420.7236372279.

The spelling of 74471609 in words is "seventy-four million, four hundred seventy-one thousand, six hundred nine".