75092021 has 2 divisors, whose sum is σ = 75092022. Its totient is φ = 75092020.

The previous prime is 75091993. The next prime is 75092027. The reversal of 75092021 is 12029057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 4363921 = 8410^2 + 2089^2 .

It is an emirp because it is prime and its reverse (12029057) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75092021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75092027) 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 as a sum of consecutive naturals, namely, 37546010 + 37546011.

It is an arithmetic number, because the mean of its divisors is an integer number (37546011).

Almost surely, 2^75092021 is an apocalyptic number.

It is an amenable number.

75092021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75092021 is an equidigital number, since it uses as much as digits as its factorization.

75092021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 75092021 is about 8665.5652441142. The cubic root of 75092021 is about 421.8887366428. Note that the first 3 decimals are identical.

The spelling of 75092021 in words is "seventy-five million, ninety-two thousand, twenty-one".