75243906 has 12 divisors (see below), whose sum is σ = 163028502. Its totient is φ = 25081296.

The previous prime is 75243901. The next prime is 75243919. The reversal of 75243906 is 60934257.

It can be written as a sum of positive squares in only one way, i.e., 72948681 + 2295225 = 8541^2 + 1515^2 .

It is not an unprimeable number, because it can be changed into a prime (75243901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2090091 + ... + 2090126.

Almost surely, 2^75243906 is an apocalyptic number.

75243906 is an abundant number, since it is smaller than the sum of its proper divisors (87784596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75243906 is a wasteful number, since it uses less digits than its factorization.

75243906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180225 (or 4180222 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 75243906 is about 8674.3245270165. The cubic root of 75243906 is about 422.1729897300.

The spelling of 75243906 in words is "seventy-five million, two hundred forty-three thousand, nine hundred six".