99994861 has 2 divisors, whose sum is σ = 99994862. Its totient is φ = 99994860.

The previous prime is 99994849. The next prime is 99994877. The reversal of 99994861 is 16849999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74046025 + 25948836 = 8605^2 + 5094^2 .

It is an emirp because it is prime and its reverse (16849999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99994861 - 2¹¹ = 99992813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99994801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49997430 + 49997431.

It is an arithmetic number, because the mean of its divisors is an integer number (49997431).

Almost surely, 2^99994861 is an apocalyptic number.

It is an amenable number.

99994861 is a deficient number, since it is larger than the sum of its proper divisors (1).

99994861 is an equidigital number, since it uses as much as digits as its factorization.

99994861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1259712, while the sum is 55.

The square root of 99994861 is about 9999.7430466988. The cubic root of 99994861 is about 464.1509321834.

The spelling of 99994861 in words is "ninety-nine million, nine hundred ninety-four thousand, eight hundred sixty-one".