94531681 has 2 divisors, whose sum is σ = 94531682. Its totient is φ = 94531680.

The previous prime is 94531663. The next prime is 94531693. The reversal of 94531681 is 18613549.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89870400 + 4661281 = 9480^2 + 2159^2 .

It is a cyclic number.

It is not a de Polignac number, because 94531681 - 2⁷ = 94531553 is a prime.

It is a super-2 number, since 2×94531681² = 17872477425371522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 94531681.

It is not a weakly prime, because it can be changed into another prime (94531621) 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, 47265840 + 47265841.

It is an arithmetic number, because the mean of its divisors is an integer number (47265841).

Almost surely, 2^94531681 is an apocalyptic number.

It is an amenable number.

94531681 is a deficient number, since it is larger than the sum of its proper divisors (1).

94531681 is an equidigital number, since it uses as much as digits as its factorization.

94531681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 37.

The square root of 94531681 is about 9722.7404058732. The cubic root of 94531681 is about 455.5392407161.

The spelling of 94531681 in words is "ninety-four million, five hundred thirty-one thousand, six hundred eighty-one".