74456647 has 2 divisors, whose sum is σ = 74456648. Its totient is φ = 74456646.

The previous prime is 74456639. The next prime is 74456653. The reversal of 74456647 is 74665447.

It is a strong prime.

It is an emirp because it is prime and its reverse (74665447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74456647 - 2³ = 74456639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74456677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37228323 + 37228324.

It is an arithmetic number, because the mean of its divisors is an integer number (37228324).

Almost surely, 2^74456647 is an apocalyptic number.

74456647 is a deficient number, since it is larger than the sum of its proper divisors (1).

74456647 is an equidigital number, since it uses as much as digits as its factorization.

74456647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 43.

The square root of 74456647 is about 8628.8265134953. The cubic root of 74456647 is about 420.6954596501.

The spelling of 74456647 in words is "seventy-four million, four hundred fifty-six thousand, six hundred forty-seven".