74137993 has 4 divisors (see below), whose sum is σ = 77361408. Its totient is φ = 70914580.

The previous prime is 74137991. The next prime is 74138017. The reversal of 74137993 is 39973147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74137993 - 2¹ = 74137991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74137991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1611673 + ... + 1611718.

It is an arithmetic number, because the mean of its divisors is an integer number (19340352).

Almost surely, 2^74137993 is an apocalyptic number.

It is an amenable number.

74137993 is a deficient number, since it is larger than the sum of its proper divisors (3223415).

74137993 is a wasteful number, since it uses less digits than its factorization.

74137993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223414.

The product of its digits is 142884, while the sum is 43.

The square root of 74137993 is about 8610.3422115500. The cubic root of 74137993 is about 420.0944477692.

The spelling of 74137993 in words is "seventy-four million, one hundred thirty-seven thousand, nine hundred ninety-three".