75422981 has 2 divisors, whose sum is σ = 75422982. Its totient is φ = 75422980.

The previous prime is 75422953. The next prime is 75422987. The reversal of 75422981 is 18922457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53949025 + 21473956 = 7345^2 + 4634^2 .

It is a cyclic number.

It is not a de Polignac number, because 75422981 - 2⁶ = 75422917 is a prime.

It is a super-2 number, since 2×75422981² = 11377252125852722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75422987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37711490 + 37711491.

It is an arithmetic number, because the mean of its divisors is an integer number (37711491).

Almost surely, 2^75422981 is an apocalyptic number.

It is an amenable number.

75422981 is a deficient number, since it is larger than the sum of its proper divisors (1).

75422981 is an equidigital number, since it uses as much as digits as its factorization.

75422981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 38.

The square root of 75422981 is about 8684.6405222093. The cubic root of 75422981 is about 422.5076380165.

The spelling of 75422981 in words is "seventy-five million, four hundred twenty-two thousand, nine hundred eighty-one".