75847993 has 4 divisors (see below), whose sum is σ = 81682468. Its totient is φ = 70013520.

The previous prime is 75847987. The next prime is 75848009. The reversal of 75847993 is 39974857.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39974857 = 13 ⋅3074989.

It can be written as a sum of positive squares in 2 ways, for example, as 20539024 + 55308969 = 4532^2 + 7437^2 .

It is a cyclic number.

It is not a de Polignac number, because 75847993 - 2⁹ = 75847481 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 75847993.

It is not an unprimeable number, because it can be changed into a prime (75247993) 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, 2917218 + ... + 2917243.

It is an arithmetic number, because the mean of its divisors is an integer number (20420617).

Almost surely, 2^75847993 is an apocalyptic number.

It is an amenable number.

75847993 is a deficient number, since it is larger than the sum of its proper divisors (5834475).

75847993 is a wasteful number, since it uses less digits than its factorization.

75847993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5834474.

The product of its digits is 1905120, while the sum is 52.

The square root of 75847993 is about 8709.0753240513. The cubic root of 75847993 is about 423.2997686962.

The spelling of 75847993 in words is "seventy-five million, eight hundred forty-seven thousand, nine hundred ninety-three".