75140549 has 4 divisors (see below), whose sum is σ = 81971520. Its totient is φ = 68309580.

The previous prime is 75140543. The next prime is 75140603. The reversal of 75140549 is 94504157.

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.

It is a cyclic number.

It is not a de Polignac number, because 75140549 - 2⁸ = 75140293 is a prime.

It is a super-2 number, since 2×75140549² = 11292204208042802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75140543) 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, 3415469 + ... + 3415490.

It is an arithmetic number, because the mean of its divisors is an integer number (20492880).

Almost surely, 2^75140549 is an apocalyptic number.

It is an amenable number.

75140549 is a deficient number, since it is larger than the sum of its proper divisors (6830971).

75140549 is a wasteful number, since it uses less digits than its factorization.

75140549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6830970.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 75140549 is about 8668.3648400376. The cubic root of 75140549 is about 421.9795985285.

The spelling of 75140549 in words is "seventy-five million, one hundred forty thousand, five hundred forty-nine".