75409965 has 24 divisors (see below), whose sum is σ = 132930720. Its totient is φ = 39535584.

The previous prime is 75409963. The next prime is 75409973. The reversal of 75409965 is 56990457.

It is a happy number.

It is not a de Polignac number, because 75409965 - 2¹ = 75409963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 75409965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75409963) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11547 + ... + 16856.

It is an arithmetic number, because the mean of its divisors is an integer number (5538780).

Almost surely, 2^75409965 is an apocalyptic number.

It is an amenable number.

75409965 is a deficient number, since it is larger than the sum of its proper divisors (57520755).

75409965 is a wasteful number, since it uses less digits than its factorization.

75409965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28473 (or 28470 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 75409965 is about 8683.8911209204. The cubic root of 75409965 is about 422.4833320922.

The spelling of 75409965 in words is "seventy-five million, four hundred nine thousand, nine hundred sixty-five".