75899999 has 8 divisors (see below), whose sum is σ = 87318528.
Its totient is φ = 64625400.
The previous prime is 75899981. The next prime is 75900049. The reversal of 75899999 is 99999857.
It is a sphenic number, since it is the product of 3 distinct primes.
It is not a de Polignac number, because 75899999 - 28 = 75899743 is a prime.
It is a Duffinian number.
75899999 is a modest number, since divided by 9999 gives 7589 as remainder.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (75899399) 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, 34847 + ... + 36960.
It is an arithmetic number, because the mean of its divisors is an integer number (10914816).
Almost surely, 275899999 is an apocalyptic number.
75899999 is a deficient number, since it is larger than the sum of its proper divisors (11418529).
75899999 is a wasteful number, since it uses less digits than its factorization.
75899999 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 71965.
The product of its digits is 16533720, while the sum is 65.
The square root of 75899999 is about 8712.0605484581.
The cubic root of 75899999 is about 423.3964932871.
The spelling of 75899999 in words is "seventy-five million, eight hundred ninety-nine thousand, nine hundred ninety-nine".