99818749 has 2 divisors, whose sum is σ = 99818750. Its totient is φ = 99818748.

The previous prime is 99818743. The next prime is 99818773. The reversal of 99818749 is 94781899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98366724 + 1452025 = 9918^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 99818749 - 2⁵ = 99818717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99818749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99818743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49909374 + 49909375.

It is an arithmetic number, because the mean of its divisors is an integer number (49909375).

Almost surely, 2^99818749 is an apocalyptic number.

It is an amenable number.

99818749 is a deficient number, since it is larger than the sum of its proper divisors (1).

99818749 is an equidigital number, since it uses as much as digits as its factorization.

99818749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 55.

The square root of 99818749 is about 9990.9333397836. The cubic root of 99818749 is about 463.8782828900.

The spelling of 99818749 in words is "ninety-nine million, eight hundred eighteen thousand, seven hundred forty-nine".