99645739 has 2 divisors, whose sum is σ = 99645740. Its totient is φ = 99645738.

The previous prime is 99645701. The next prime is 99645743. The reversal of 99645739 is 93754699.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99645739 - 2¹⁵ = 99612971 is a prime.

It is a super-2 number, since 2×99645739² = 19858546601712242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99648739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49822869 + 49822870.

It is an arithmetic number, because the mean of its divisors is an integer number (49822870).

Almost surely, 2^99645739 is an apocalyptic number.

99645739 is a deficient number, since it is larger than the sum of its proper divisors (1).

99645739 is an equidigital number, since it uses as much as digits as its factorization.

99645739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 52.

The square root of 99645739 is about 9982.2712345438. The cubic root of 99645739 is about 463.6101235356.

The spelling of 99645739 in words is "ninety-nine million, six hundred forty-five thousand, seven hundred thirty-nine".