73827989 has 4 divisors (see below), whose sum is σ = 74505420. Its totient is φ = 73150560.

The previous prime is 73827983. The next prime is 73828009. The reversal of 73827989 is 98972837.

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

It can be written as a sum of positive squares in 2 ways, for example, as 59136100 + 14691889 = 7690^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 73827989 - 2¹⁶ = 73762453 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73827989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73827983) 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, 338552 + ... + 338769.

It is an arithmetic number, because the mean of its divisors is an integer number (18626355).

Almost surely, 2^73827989 is an apocalyptic number.

It is an amenable number.

73827989 is a deficient number, since it is larger than the sum of its proper divisors (677431).

73827989 is a wasteful number, since it uses less digits than its factorization.

73827989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677430.

The product of its digits is 1524096, while the sum is 53.

The square root of 73827989 is about 8592.3215140031. The cubic root of 73827989 is about 419.5080956860.

The spelling of 73827989 in words is "seventy-three million, eight hundred twenty-seven thousand, nine hundred eighty-nine".