75438091 has 16 divisors (see below), whose sum is σ = 80481600. Its totient is φ = 70563328.

The previous prime is 75438071. The next prime is 75438101. The reversal of 75438091 is 19083457.

It is a cyclic number.

It is not a de Polignac number, because 75438091 - 2⁷ = 75437963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75438091.

It is not an unprimeable number, because it can be changed into a prime (75438031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 280305 + ... + 280573.

It is an arithmetic number, because the mean of its divisors is an integer number (5030100).

Almost surely, 2^75438091 is an apocalyptic number.

75438091 is a deficient number, since it is larger than the sum of its proper divisors (5043509).

75438091 is a wasteful number, since it uses less digits than its factorization.

75438091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 75438091 is about 8685.5104052669. The cubic root of 75438091 is about 422.5358507445.

The spelling of 75438091 in words is "seventy-five million, four hundred thirty-eight thousand, ninety-one".