75689999 has 16 divisors (see below), whose sum is σ = 95212800. Its totient is φ = 58450560.

The previous prime is 75689993. The next prime is 75690023. The reversal of 75689999 is 99998657.

It is a Cunningham number, because it is equal to 8700²-1.

It is not a de Polignac number, because 75689999 - 2⁴ = 75689983 is a prime.

It is a Duffinian number.

75689999 is a modest number, since divided by 9999 gives 7568 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75689993) 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, 4352 + ... + 13050.

It is an arithmetic number, because the mean of its divisors is an integer number (5950800).

Almost surely, 2^75689999 is an apocalyptic number.

75689999 is a deficient number, since it is larger than the sum of its proper divisors (19522801).

75689999 is a wasteful number, since it uses less digits than its factorization.

75689999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830.

The product of its digits is 11022480, while the sum is 62.

The square root of 75689999 is about 8699.9999425287. Note that the first 4 decimals coincide. The cubic root of 75689999 is about 423.0056483475.

The spelling of 75689999 in words is "seventy-five million, six hundred eighty-nine thousand, nine hundred ninety-nine".