83128087 has 8 divisors (see below), whose sum is σ = 95876000. Its totient is φ = 70598304.

The previous prime is 83128061. The next prime is 83128099. The reversal of 83128087 is 78082138.

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

It is not a de Polignac number, because 83128087 - 2⁷ = 83127959 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 (83128027) 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, 53712 + ... + 55237.

It is an arithmetic number, because the mean of its divisors is an integer number (11984500).

Almost surely, 2^83128087 is an apocalyptic number.

83128087 is a deficient number, since it is larger than the sum of its proper divisors (12747913).

83128087 is a wasteful number, since it uses less digits than its factorization.

83128087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109065.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 83128087 is about 9117.4605565366. The cubic root of 83128087 is about 436.4313391861.

The spelling of 83128087 in words is "eighty-three million, one hundred twenty-eight thousand, eighty-seven".