75715993 has 4 divisors (see below), whose sum is σ = 75746560. Its totient is φ = 75685428.

The previous prime is 75715987. The next prime is 75715999. The reversal of 75715993 is 39951757.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39951757 = 3853 ⋅10369.

It is an interprime number because it is at equal distance from previous prime (75715987) and next prime (75715999).

It is a cyclic number.

It is not a de Polignac number, because 75715993 - 2⁹ = 75715481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75715999) 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, 11205 + ... + 16642.

It is an arithmetic number, because the mean of its divisors is an integer number (18936640).

Almost surely, 2^75715993 is an apocalyptic number.

It is an amenable number.

75715993 is a deficient number, since it is larger than the sum of its proper divisors (30567).

75715993 is a wasteful number, since it uses less digits than its factorization.

75715993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30566.

The product of its digits is 297675, while the sum is 46.

The square root of 75715993 is about 8701.4937223445. The cubic root of 75715993 is about 423.0540666788.

The spelling of 75715993 in words is "seventy-five million, seven hundred fifteen thousand, nine hundred ninety-three".