74221999 has 8 divisors (see below), whose sum is σ = 79946240. Its totient is φ = 68679576.

The previous prime is 74221957. The next prime is 74222009. The reversal of 74221999 is 99912247.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74221999 - 2⁹ = 74221487 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74221699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44607 + ... + 46240.

It is an arithmetic number, because the mean of its divisors is an integer number (9993280).

Almost surely, 2^74221999 is an apocalyptic number.

74221999 is a deficient number, since it is larger than the sum of its proper divisors (5724241).

74221999 is a wasteful number, since it uses less digits than its factorization.

74221999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90909.

The product of its digits is 81648, while the sum is 43.

The square root of 74221999 is about 8615.2190337797. The cubic root of 74221999 is about 420.2530580035.

The spelling of 74221999 in words is "seventy-four million, two hundred twenty-one thousand, nine hundred ninety-nine".