75418109 has 6 divisors (see below), whose sum is σ = 81665946. Its totient is φ = 69616560.

The previous prime is 75418051. The next prime is 75418111. The reversal of 75418109 is 90181457.

It can be written as a sum of positive squares in 3 ways, for example, as 1836025 + 73582084 = 1355^2 + 8578^2 .

It is not a de Polignac number, because 75418109 - 2¹² = 75414013 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 (75418129) 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, 222962 + ... + 223299.

It is an arithmetic number, because the mean of its divisors is an integer number (13610991).

Almost surely, 2^75418109 is an apocalyptic number.

It is an amenable number.

75418109 is a deficient number, since it is larger than the sum of its proper divisors (6247837).

75418109 is a wasteful number, since it uses less digits than its factorization.

75418109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446287 (or 446274 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 75418109 is about 8684.3600224772. The cubic root of 75418109 is about 422.4985404289.

The spelling of 75418109 in words is "seventy-five million, four hundred eighteen thousand, one hundred nine".