75967621 has 2 divisors, whose sum is σ = 75967622. Its totient is φ = 75967620.

The previous prime is 75967613. The next prime is 75967637. The reversal of 75967621 is 12676957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 5239521 = 8410^2 + 2289^2 .

It is an emirp because it is prime and its reverse (12676957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75967621 - 2³ = 75967613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75967601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37983810 + 37983811.

It is an arithmetic number, because the mean of its divisors is an integer number (37983811).

Almost surely, 2^75967621 is an apocalyptic number.

It is an amenable number.

75967621 is a deficient number, since it is larger than the sum of its proper divisors (1).

75967621 is an equidigital number, since it uses as much as digits as its factorization.

75967621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 75967621 is about 8715.9406262319. The cubic root of 75967621 is about 423.5221956124.

The spelling of 75967621 in words is "seventy-five million, nine hundred sixty-seven thousand, six hundred twenty-one".