83172830 has 32 divisors (see below), whose sum is σ = 168243264. Its totient is φ = 29373696.

The previous prime is 83172827. The next prime is 83172833. The reversal of 83172830 is 3827138.

It is an interprime number because it is at equal distance from previous prime (83172827) and next prime (83172833).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83172833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10919 + ... + 16898.

It is an arithmetic number, because the mean of its divisors is an integer number (5257602).

Almost surely, 2^83172830 is an apocalyptic number.

83172830 is an abundant number, since it is smaller than the sum of its proper divisors (85070434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83172830 is a wasteful number, since it uses less digits than its factorization.

83172830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27860.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 83172830 is about 9119.9139250324. The cubic root of 83172830 is about 436.5096269855.

Adding to 83172830 its reverse (3827138), we get a palindrome (86999968).

The spelling of 83172830 in words is "eighty-three million, one hundred seventy-two thousand, eight hundred thirty".