75321953 has 4 divisors (see below), whose sum is σ = 86082240. Its totient is φ = 64561668.

The previous prime is 75321931. The next prime is 75321959. The reversal of 75321953 is 35912357.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75321953 - 2²⁰ = 74273377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75321959) 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 3 ways as a sum of consecutive naturals, for example, 5380133 + ... + 5380146.

It is an arithmetic number, because the mean of its divisors is an integer number (21520560).

Almost surely, 2^75321953 is an apocalyptic number.

It is an amenable number.

75321953 is a deficient number, since it is larger than the sum of its proper divisors (10760287).

75321953 is a wasteful number, since it uses less digits than its factorization.

75321953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10760286.

The product of its digits is 28350, while the sum is 35.

The square root of 75321953 is about 8678.8220974969. The cubic root of 75321953 is about 422.3189060855.

The spelling of 75321953 in words is "seventy-five million, three hundred twenty-one thousand, nine hundred fifty-three".