74040649 has 2 divisors, whose sum is σ = 74040650. Its totient is φ = 74040648.

The previous prime is 74040601. The next prime is 74040653. The reversal of 74040649 is 94604047.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41835024 + 32205625 = 6468^2 + 5675^2 .

It is an emirp because it is prime and its reverse (94604047) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74040649 - 2¹³ = 74032457 is a prime.

It is not a weakly prime, because it can be changed into another prime (74040349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37020324 + 37020325.

It is an arithmetic number, because the mean of its divisors is an integer number (37020325).

Almost surely, 2^74040649 is an apocalyptic number.

It is an amenable number.

74040649 is a deficient number, since it is larger than the sum of its proper divisors (1).

74040649 is an equidigital number, since it uses as much as digits as its factorization.

74040649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 74040649 is about 8604.6876178046. The cubic root of 74040649 is about 419.9105043628.

The spelling of 74040649 in words is "seventy-four million, forty thousand, six hundred forty-nine".