75433921 has 2 divisors, whose sum is σ = 75433922. Its totient is φ = 75433920.

The previous prime is 75433903. The next prime is 75433927. The reversal of 75433921 is 12933457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70308225 + 5125696 = 8385^2 + 2264^2 .

It is a cyclic number.

It is not a de Polignac number, because 75433921 - 2⁵ = 75433889 is a prime.

It is not a weakly prime, because it can be changed into another prime (75433927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37716960 + 37716961.

It is an arithmetic number, because the mean of its divisors is an integer number (37716961).

Almost surely, 2^75433921 is an apocalyptic number.

It is an amenable number.

75433921 is a deficient number, since it is larger than the sum of its proper divisors (1).

75433921 is an equidigital number, since it uses as much as digits as its factorization.

75433921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 34.

The square root of 75433921 is about 8685.2703469725. The cubic root of 75433921 is about 422.5280650801.

The spelling of 75433921 in words is "seventy-five million, four hundred thirty-three thousand, nine hundred twenty-one".