75281963 has 2 divisors, whose sum is σ = 75281964. Its totient is φ = 75281962.

The previous prime is 75281953. The next prime is 75281977. The reversal of 75281963 is 36918257.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75281963 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75281963.

It is not a weakly prime, because it can be changed into another prime (75281923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37640981 + 37640982.

It is an arithmetic number, because the mean of its divisors is an integer number (37640982).

Almost surely, 2^75281963 is an apocalyptic number.

75281963 is a deficient number, since it is larger than the sum of its proper divisors (1).

75281963 is an equidigital number, since it uses as much as digits as its factorization.

75281963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 75281963 is about 8676.5179075479. The cubic root of 75281963 is about 422.2441535417.

The spelling of 75281963 in words is "seventy-five million, two hundred eighty-one thousand, nine hundred sixty-three".