75673921 has 2 divisors, whose sum is σ = 75673922. Its totient is φ = 75673920.

The previous prime is 75673909. The next prime is 75673943. The reversal of 75673921 is 12937657.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73530625 + 2143296 = 8575^2 + 1464^2 .

It is a cyclic number.

It is not a de Polignac number, because 75673921 - 2⁵ = 75673889 is a prime.

It is not a weakly prime, because it can be changed into another prime (75673951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37836960 + 37836961.

It is an arithmetic number, because the mean of its divisors is an integer number (37836961).

Almost surely, 2^75673921 is an apocalyptic number.

It is an amenable number.

75673921 is a deficient number, since it is larger than the sum of its proper divisors (1).

75673921 is an equidigital number, since it uses as much as digits as its factorization.

75673921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 40.

The square root of 75673921 is about 8699.0758704589. The cubic root of 75673921 is about 422.9756947362.

The spelling of 75673921 in words is "seventy-five million, six hundred seventy-three thousand, nine hundred twenty-one".