75409172 has 6 divisors (see below), whose sum is σ = 131966058. Its totient is φ = 37704584.

The previous prime is 75409151. The next prime is 75409177. The reversal of 75409172 is 27190457.

It can be written as a sum of positive squares in only one way, i.e., 52330756 + 23078416 = 7234^2 + 4804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75409177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9426143 + ... + 9426150.

It is an arithmetic number, because the mean of its divisors is an integer number (21994343).

Almost surely, 2^75409172 is an apocalyptic number.

It is an amenable number.

75409172 is a deficient number, since it is larger than the sum of its proper divisors (56556886).

75409172 is a wasteful number, since it uses less digits than its factorization.

75409172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18852297 (or 18852295 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 75409172 is about 8683.8454615452. The cubic root of 75409172 is about 422.4818511630.

The spelling of 75409172 in words is "seventy-five million, four hundred nine thousand, one hundred seventy-two".