99940693 has 2 divisors, whose sum is σ = 99940694. Its totient is φ = 99940692.

The previous prime is 99940639. The next prime is 99940697. The reversal of 99940693 is 39604999.

Together with previous prime (99940639) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98863249 + 1077444 = 9943^2 + 1038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99940693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99940697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49970346 + 49970347.

It is an arithmetic number, because the mean of its divisors is an integer number (49970347).

Almost surely, 2^99940693 is an apocalyptic number.

It is an amenable number.

99940693 is a deficient number, since it is larger than the sum of its proper divisors (1).

99940693 is an equidigital number, since it uses as much as digits as its factorization.

99940693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472392, while the sum is 49.

The square root of 99940693 is about 9997.0342102045. The cubic root of 99940693 is about 464.0671056457.

The spelling of 99940693 in words is "ninety-nine million, nine hundred forty thousand, six hundred ninety-three".