74472847 has 2 divisors, whose sum is σ = 74472848. Its totient is φ = 74472846.

The previous prime is 74472821. The next prime is 74472859. The reversal of 74472847 is 74827447.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74472847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74472247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37236423 + 37236424.

It is an arithmetic number, because the mean of its divisors is an integer number (37236424).

Almost surely, 2^74472847 is an apocalyptic number.

74472847 is a deficient number, since it is larger than the sum of its proper divisors (1).

74472847 is an equidigital number, since it uses as much as digits as its factorization.

74472847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 43.

The square root of 74472847 is about 8629.7651764112. The cubic root of 74472847 is about 420.7259685547.

The spelling of 74472847 in words is "seventy-four million, four hundred seventy-two thousand, eight hundred forty-seven".