74471993 has 2 divisors, whose sum is σ = 74471994. Its totient is φ = 74471992.

The previous prime is 74471981. The next prime is 74472043. The reversal of 74471993 is 39917447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63792169 + 10679824 = 7987^2 + 3268^2 .

It is a cyclic number.

It is not a de Polignac number, because 74471993 - 2⁴ = 74471977 is a prime.

It is not a weakly prime, because it can be changed into another prime (74471933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37235996 + 37235997.

It is an arithmetic number, because the mean of its divisors is an integer number (37235997).

Almost surely, 2^74471993 is an apocalyptic number.

It is an amenable number.

74471993 is a deficient number, since it is larger than the sum of its proper divisors (1).

74471993 is an equidigital number, since it uses as much as digits as its factorization.

74471993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 190512, while the sum is 44.

The square root of 74471993 is about 8629.7156963599. The cubic root of 74471993 is about 420.7243603563.

The spelling of 74471993 in words is "seventy-four million, four hundred seventy-one thousand, nine hundred ninety-three".