75421723 has 4 divisors (see below), whose sum is σ = 81223408. Its totient is φ = 69620040.

The previous prime is 75421693. The next prime is 75421733. The reversal of 75421723 is 32712457.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75421723 - 2¹³ = 75413531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75421733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2900823 + ... + 2900848.

It is an arithmetic number, because the mean of its divisors is an integer number (20305852).

Almost surely, 2^75421723 is an apocalyptic number.

75421723 is a deficient number, since it is larger than the sum of its proper divisors (5801685).

75421723 is a wasteful number, since it uses less digits than its factorization.

75421723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5801684.

The product of its digits is 11760, while the sum is 31.

The square root of 75421723 is about 8684.5680951905. The cubic root of 75421723 is about 422.5052889643.

The spelling of 75421723 in words is "seventy-five million, four hundred twenty-one thousand, seven hundred twenty-three".