99142789 has 2 divisors, whose sum is σ = 99142790. Its totient is φ = 99142788.

The previous prime is 99142777. The next prime is 99142801. The reversal of 99142789 is 98724199.

It is a balanced prime because it is at equal distance from previous prime (99142777) and next prime (99142801).

It can be written as a sum of positive squares in only one way, i.e., 85710564 + 13432225 = 9258^2 + 3665^2 .

It is a cyclic number.

It is not a de Polignac number, because 99142789 - 2¹⁹ = 98618501 is a prime.

It is a super-2 number, since 2×99142789² = 19658585221397042, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99142739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49571394 + 49571395.

It is an arithmetic number, because the mean of its divisors is an integer number (49571395).

Almost surely, 2^99142789 is an apocalyptic number.

It is an amenable number.

99142789 is a deficient number, since it is larger than the sum of its proper divisors (1).

99142789 is an equidigital number, since it uses as much as digits as its factorization.

99142789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 99142789 is about 9957.0472028609. The cubic root of 99142789 is about 462.8288018869.

The spelling of 99142789 in words is "ninety-nine million, one hundred forty-two thousand, seven hundred eighty-nine".