94991509 has 2 divisors, whose sum is σ = 94991510. Its totient is φ = 94991508.

The previous prime is 94991503. The next prime is 94991521. The reversal of 94991509 is 90519949.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86081284 + 8910225 = 9278^2 + 2985^2 .

It is a cyclic number.

It is not a de Polignac number, because 94991509 - 2⁹ = 94990997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (94991503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47495754 + 47495755.

It is an arithmetic number, because the mean of its divisors is an integer number (47495755).

Almost surely, 2^94991509 is an apocalyptic number.

It is an amenable number.

94991509 is a deficient number, since it is larger than the sum of its proper divisors (1).

94991509 is an equidigital number, since it uses as much as digits as its factorization.

94991509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 94991509 is about 9746.3587559663. The cubic root of 94991509 is about 456.2766688858.

The spelling of 94991509 in words is "ninety-four million, nine hundred ninety-one thousand, five hundred nine".