73689887 has 4 divisors (see below), whose sum is σ = 74184600. Its totient is φ = 73195176.

The previous prime is 73689871. The next prime is 73689911. The reversal of 73689887 is 78898637.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73689887 - 2⁴ = 73689871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73683887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247133 + ... + 247430.

It is an arithmetic number, because the mean of its divisors is an integer number (18546150).

Almost surely, 2^73689887 is an apocalyptic number.

73689887 is a deficient number, since it is larger than the sum of its proper divisors (494713).

73689887 is a wasteful number, since it uses less digits than its factorization.

73689887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494712.

The product of its digits is 4064256, while the sum is 56.

The square root of 73689887 is about 8584.2813910076. The cubic root of 73689887 is about 419.2463563394.

The spelling of 73689887 in words is "seventy-three million, six hundred eighty-nine thousand, eight hundred eighty-seven".