73946981 has 2 divisors, whose sum is σ = 73946982. Its totient is φ = 73946980.

The previous prime is 73946969. The next prime is 73946989. The reversal of 73946981 is 18964937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61230625 + 12716356 = 7825^2 + 3566^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73946981 is a prime.

It is a super-2 number, since 2×73946981² = 10936311998028722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73946989) 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, 36973490 + 36973491.

It is an arithmetic number, because the mean of its divisors is an integer number (36973491).

Almost surely, 2^73946981 is an apocalyptic number.

It is an amenable number.

73946981 is a deficient number, since it is larger than the sum of its proper divisors (1).

73946981 is an equidigital number, since it uses as much as digits as its factorization.

73946981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 73946981 is about 8599.2430480828. The cubic root of 73946981 is about 419.7333549385.

The spelling of 73946981 in words is "seventy-three million, nine hundred forty-six thousand, nine hundred eighty-one".