99711389 has 2 divisors, whose sum is σ = 99711390. Its totient is φ = 99711388.

The previous prime is 99711377. The next prime is 99711397. The reversal of 99711389 is 98311799.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91202500 + 8508889 = 9550^2 + 2917^2 .

It is a cyclic number.

It is not a de Polignac number, because 99711389 - 2¹⁶ = 99645853 is a prime.

It is a super-2 number, since 2×99711389² = 19884722192618642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99711319) 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, 49855694 + 49855695.

It is an arithmetic number, because the mean of its divisors is an integer number (49855695).

Almost surely, 2^99711389 is an apocalyptic number.

It is an amenable number.

99711389 is a deficient number, since it is larger than the sum of its proper divisors (1).

99711389 is an equidigital number, since it uses as much as digits as its factorization.

99711389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 47.

The square root of 99711389 is about 9985.5590229090. The cubic root of 99711389 is about 463.7119152204.

The spelling of 99711389 in words is "ninety-nine million, seven hundred eleven thousand, three hundred eighty-nine".