75645199 has 4 divisors (see below), whose sum is σ = 86451664. Its totient is φ = 64838736.

The previous prime is 75645197. The next prime is 75645209. The reversal of 75645199 is 99154657.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99154657 = 7 ⋅14164951.

It is a cyclic number.

It is not a de Polignac number, because 75645199 - 2¹ = 75645197 is a prime.

It is a super-2 number, since 2×75645199² = 11444392263499202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75645191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5403222 + ... + 5403235.

It is an arithmetic number, because the mean of its divisors is an integer number (21612916).

Almost surely, 2^75645199 is an apocalyptic number.

75645199 is a deficient number, since it is larger than the sum of its proper divisors (10806465).

75645199 is a wasteful number, since it uses less digits than its factorization.

75645199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10806464.

The product of its digits is 340200, while the sum is 46.

The square root of 75645199 is about 8697.4248487699. The cubic root of 75645199 is about 422.9221745579.

The spelling of 75645199 in words is "seventy-five million, six hundred forty-five thousand, one hundred ninety-nine".