75205997 has 4 divisors (see below), whose sum is σ = 75473916. Its totient is φ = 74938080.

The previous prime is 75205981. The next prime is 75206017. The reversal of 75205997 is 79950257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79950257 = 73 ⋅1095209.

It can be written as a sum of positive squares in 2 ways, for example, as 41809156 + 33396841 = 6466^2 + 5779^2 .

It is a cyclic number.

It is not a de Polignac number, because 75205997 - 2⁴ = 75205981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75205927) 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, 133538 + ... + 134099.

It is an arithmetic number, because the mean of its divisors is an integer number (18868479).

Almost surely, 2^75205997 is an apocalyptic number.

It is an amenable number.

75205997 is a deficient number, since it is larger than the sum of its proper divisors (267919).

75205997 is a wasteful number, since it uses less digits than its factorization.

75205997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267918.

The product of its (nonzero) digits is 198450, while the sum is 44.

The square root of 75205997 is about 8672.1391248065. The cubic root of 75205997 is about 422.1020788076.

The spelling of 75205997 in words is "seventy-five million, two hundred five thousand, nine hundred ninety-seven".