74021999 has 2 divisors, whose sum is σ = 74022000. Its totient is φ = 74021998.

The previous prime is 74021977. The next prime is 74022001. The reversal of 74021999 is 99912047.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 74021999 - 2⁸ = 74021743 is a prime.

Together with 74022001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74021699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37010999 + 37011000.

It is an arithmetic number, because the mean of its divisors is an integer number (37011000).

Almost surely, 2^74021999 is an apocalyptic number.

74021999 is a deficient number, since it is larger than the sum of its proper divisors (1).

74021999 is an equidigital number, since it uses as much as digits as its factorization.

74021999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 74021999 is about 8603.6038379275. The cubic root of 74021999 is about 419.8752445038.

The spelling of 74021999 in words is "seventy-four million, twenty-one thousand, nine hundred ninety-nine".