99756389 has 2 divisors, whose sum is σ = 99756390. Its totient is φ = 99756388.

The previous prime is 99756379. The next prime is 99756409. The reversal of 99756389 is 98365799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99660289 + 96100 = 9983^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 99756389 - 2⁴ = 99756373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99756379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49878194 + 49878195.

It is an arithmetic number, because the mean of its divisors is an integer number (49878195).

Almost surely, 2^99756389 is an apocalyptic number.

It is an amenable number.

99756389 is a deficient number, since it is larger than the sum of its proper divisors (1).

99756389 is an equidigital number, since it uses as much as digits as its factorization.

99756389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3674160, while the sum is 56.

The square root of 99756389 is about 9987.8120226604. The cubic root of 99756389 is about 463.7816628459.

The spelling of 99756389 in words is "ninety-nine million, seven hundred fifty-six thousand, three hundred eighty-nine".