74445947 has 2 divisors, whose sum is σ = 74445948. Its totient is φ = 74445946.

The previous prime is 74445923. The next prime is 74445949. The reversal of 74445947 is 74954447.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74445947 - 2⁸ = 74445691 is a prime.

Together with 74445949, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 74445898 and 74445907.

It is not a weakly prime, because it can be changed into another prime (74445949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37222973 + 37222974.

It is an arithmetic number, because the mean of its divisors is an integer number (37222974).

Almost surely, 2^74445947 is an apocalyptic number.

74445947 is a deficient number, since it is larger than the sum of its proper divisors (1).

74445947 is an equidigital number, since it uses as much as digits as its factorization.

74445947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 44.

The square root of 74445947 is about 8628.2064764353. The cubic root of 74445947 is about 420.6753062801.

The spelling of 74445947 in words is "seventy-four million, four hundred forty-five thousand, nine hundred forty-seven".