75147397 has 4 divisors (see below), whose sum is σ = 80927980. Its totient is φ = 69366816.

The previous prime is 75147367. The next prime is 75147403. The reversal of 75147397 is 79374157.

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

It can be written as a sum of positive squares in 2 ways, for example, as 28238596 + 46908801 = 5314^2 + 6849^2 .

It is a cyclic number.

It is not a de Polignac number, because 75147397 - 2¹¹ = 75145349 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 (75147367) 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, 2890272 + ... + 2890297.

It is an arithmetic number, because the mean of its divisors is an integer number (20231995).

Almost surely, 2^75147397 is an apocalyptic number.

It is an amenable number.

75147397 is a deficient number, since it is larger than the sum of its proper divisors (5780583).

75147397 is a wasteful number, since it uses less digits than its factorization.

75147397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5780582.

The product of its digits is 185220, while the sum is 43.

The square root of 75147397 is about 8668.7598305640. The cubic root of 75147397 is about 421.9924172997.

The spelling of 75147397 in words is "seventy-five million, one hundred forty-seven thousand, three hundred ninety-seven".