75413821 has 8 divisors (see below), whose sum is σ = 86549760. Its totient is φ = 64368528.

The previous prime is 75413809. The next prime is 75413837. The reversal of 75413821 is 12831457.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 75413821 - 2¹⁹ = 74889533 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 (75411821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20866 + ... + 24211.

It is an arithmetic number, because the mean of its divisors is an integer number (10818720).

Almost surely, 2^75413821 is an apocalyptic number.

It is an amenable number.

75413821 is a deficient number, since it is larger than the sum of its proper divisors (11135939).

75413821 is a wasteful number, since it uses less digits than its factorization.

75413821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45323.

The product of its digits is 6720, while the sum is 31.

The square root of 75413821 is about 8684.1131383694. The cubic root of 75413821 is about 422.4905330325.

The spelling of 75413821 in words is "seventy-five million, four hundred thirteen thousand, eight hundred twenty-one".