74189723 has 2 divisors, whose sum is σ = 74189724. Its totient is φ = 74189722.

The previous prime is 74189719. The next prime is 74189783. The reversal of 74189723 is 32798147.

It is a weak prime.

It is an emirp because it is prime and its reverse (32798147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74189723 - 2² = 74189719 is a prime.

It is a super-2 number, since 2×74189723² = 11008229997633458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74189783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37094861 + 37094862.

It is an arithmetic number, because the mean of its divisors is an integer number (37094862).

Almost surely, 2^74189723 is an apocalyptic number.

74189723 is a deficient number, since it is larger than the sum of its proper divisors (1).

74189723 is an equidigital number, since it uses as much as digits as its factorization.

74189723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 74189723 is about 8613.3456333762. The cubic root of 74189723 is about 420.1921324266.

The spelling of 74189723 in words is "seventy-four million, one hundred eighty-nine thousand, seven hundred twenty-three".