74321999 has 2 divisors, whose sum is σ = 74322000. Its totient is φ = 74321998.

The previous prime is 74321987. The next prime is 74322013. The reversal of 74321999 is 99912347.

It is a weak prime.

It is an emirp because it is prime and its reverse (99912347) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74321999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74323999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37160999 + 37161000.

It is an arithmetic number, because the mean of its divisors is an integer number (37161000).

Almost surely, 2^74321999 is an apocalyptic number.

74321999 is a deficient number, since it is larger than the sum of its proper divisors (1).

74321999 is an equidigital number, since it uses as much as digits as its factorization.

74321999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 74321999 is about 8621.0207632275. The cubic root of 74321999 is about 420.4417102755.

The spelling of 74321999 in words is "seventy-four million, three hundred twenty-one thousand, nine hundred ninety-nine".