84173290 has 32 divisors (see below), whose sum is σ = 163074384. Its totient is φ = 31165440.

The previous prime is 84173279. The next prime is 84173291. The reversal of 84173290 is 9237148.

It can be written as a sum of positive squares in 8 ways, for example, as 43046721 + 41126569 = 6561^2 + 6413^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (84173291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6312 + ... + 14428.

Almost surely, 2^84173290 is an apocalyptic number.

84173290 is a deficient number, since it is larger than the sum of its proper divisors (78901094).

84173290 is a wasteful number, since it uses less digits than its factorization.

84173290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8202.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 84173290 is about 9174.6002637717. The cubic root of 84173290 is about 438.2528685866.

The spelling of 84173290 in words is "eighty-four million, one hundred seventy-three thousand, two hundred ninety".