73989811 has 4 divisors (see below), whose sum is σ = 84559792. Its totient is φ = 63419832.

The previous prime is 73989809. The next prime is 73989833. The reversal of 73989811 is 11898937.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11898937 = 991 ⋅12007.

It is not a de Polignac number, because 73989811 - 2¹ = 73989809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73989911) 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, 5284980 + ... + 5284993.

It is an arithmetic number, because the mean of its divisors is an integer number (21139948).

Almost surely, 2^73989811 is an apocalyptic number.

73989811 is a deficient number, since it is larger than the sum of its proper divisors (10569981).

73989811 is a wasteful number, since it uses less digits than its factorization.

73989811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10569980.

The product of its digits is 108864, while the sum is 46.

The square root of 73989811 is about 8601.7330230599. The cubic root of 73989811 is about 419.8143756450.

The spelling of 73989811 in words is "seventy-three million, nine hundred eighty-nine thousand, eight hundred eleven".