83774989 has 8 divisors (see below), whose sum is σ = 86607360. Its totient is φ = 80950800.

The previous prime is 83774987. The next prime is 83775001. The reversal of 83774989 is 98947738.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 83774989 - 2¹ = 83774987 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 (83774981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24399 + ... + 27619.

It is an arithmetic number, because the mean of its divisors is an integer number (10825920).

Almost surely, 2^83774989 is an apocalyptic number.

It is an amenable number.

83774989 is a deficient number, since it is larger than the sum of its proper divisors (2832371).

83774989 is a wasteful number, since it uses less digits than its factorization.

83774989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 3048192, while the sum is 55.

The square root of 83774989 is about 9152.8678019515. The cubic root of 83774989 is about 437.5605166899.

It can be divided in two parts, 8377 and 4989, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 83774989 in words is "eighty-three million, seven hundred seventy-four thousand, nine hundred eighty-nine".