94709581 has 2 divisors, whose sum is σ = 94709582. Its totient is φ = 94709580.

The previous prime is 94709519. The next prime is 94709599. The reversal of 94709581 is 18590749.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94575625 + 133956 = 9725^2 + 366^2 .

It is a cyclic number.

It is not a de Polignac number, because 94709581 - 2⁷ = 94709453 is a prime.

It is a super-2 number, since 2×94709581² = 17939809466391122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94709081) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47354790 + 47354791.

It is an arithmetic number, because the mean of its divisors is an integer number (47354791).

Almost surely, 2^94709581 is an apocalyptic number.

It is an amenable number.

94709581 is a deficient number, since it is larger than the sum of its proper divisors (1).

94709581 is an equidigital number, since it uses as much as digits as its factorization.

94709581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 94709581 is about 9731.8847609289. The cubic root of 94709581 is about 455.8248227427.

The spelling of 94709581 in words is "ninety-four million, seven hundred nine thousand, five hundred eighty-one".