75393985 has 4 divisors (see below), whose sum is σ = 90472788. Its totient is φ = 60315184.

The previous prime is 75393979. The next prime is 75393991. The reversal of 75393985 is 58939357.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (75393979) and next prime (75393991).

It can be written as a sum of positive squares in 2 ways, for example, as 23726641 + 51667344 = 4871^2 + 7188^2 .

It is a cyclic number.

It is not a de Polignac number, because 75393985 - 2²³ = 67005377 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7539394 + ... + 7539403.

It is an arithmetic number, because the mean of its divisors is an integer number (22618197).

Almost surely, 2^75393985 is an apocalyptic number.

It is an amenable number.

75393985 is a deficient number, since it is larger than the sum of its proper divisors (15078803).

75393985 is a wasteful number, since it uses less digits than its factorization.

75393985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15078802.

The product of its digits is 1020600, while the sum is 49.

The square root of 75393985 is about 8682.9709777242. The cubic root of 75393985 is about 422.4534874044.

The spelling of 75393985 in words is "seventy-five million, three hundred ninety-three thousand, nine hundred eighty-five".