99090429 has 16 divisors (see below), whose sum is σ = 136261632. Its totient is φ = 64017648.

The previous prime is 99090427. The next prime is 99090437. The reversal of 99090429 is 92409099.

99090429 = T₄₆₂ + T₄₆₃ + ... + T₈₈₄.

It is not a de Polignac number, because 99090429 - 2¹ = 99090427 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99090427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11112 + ... + 17934.

It is an arithmetic number, because the mean of its divisors is an integer number (8516352).

Almost surely, 2^99090429 is an apocalyptic number.

It is an amenable number.

99090429 is a deficient number, since it is larger than the sum of its proper divisors (37171203).

99090429 is a wasteful number, since it uses less digits than its factorization.

99090429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6976.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 99090429 is about 9954.4175620676. The cubic root of 99090429 is about 462.7473100517.

It can be divided in two parts, 990 and 90429, that added together give a palindrome (91419).

The spelling of 99090429 in words is "ninety-nine million, ninety thousand, four hundred twenty-nine".