74209893 has 4 divisors (see below), whose sum is σ = 98946528. Its totient is φ = 49473260.

The previous prime is 74209871. The next prime is 74209903. The reversal of 74209893 is 39890247.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39890247 = 3 ⋅13296749.

It is a cyclic number.

It is not a de Polignac number, because 74209893 - 2¹⁸ = 73947749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74209813) 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 in 3 ways as a sum of consecutive naturals, for example, 12368313 + ... + 12368318.

It is an arithmetic number, because the mean of its divisors is an integer number (24736632).

Almost surely, 2^74209893 is an apocalyptic number.

It is an amenable number.

74209893 is a deficient number, since it is larger than the sum of its proper divisors (24736635).

74209893 is a wasteful number, since it uses less digits than its factorization.

74209893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24736634.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 74209893 is about 8614.5164112677. The cubic root of 74209893 is about 420.2302082635.

The spelling of 74209893 in words is "seventy-four million, two hundred nine thousand, eight hundred ninety-three".