90199129 has 4 divisors (see below), whose sum is σ = 90666676. Its totient is φ = 89731584.

The previous prime is 90199121. The next prime is 90199159. The reversal of 90199129 is 92199109.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8838729 + 81360400 = 2973^2 + 9020^2 .

It is a cyclic number.

It is not a de Polignac number, because 90199129 - 2³ = 90199121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90199091 and 90199100.

It is not an unprimeable number, because it can be changed into a prime (90199121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233484 + ... + 233869.

It is an arithmetic number, because the mean of its divisors is an integer number (22666669).

Almost surely, 2^90199129 is an apocalyptic number.

It is an amenable number.

90199129 is a deficient number, since it is larger than the sum of its proper divisors (467547).

90199129 is a wasteful number, since it uses less digits than its factorization.

90199129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467546.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 90199129 is about 9497.3222015471. The cubic root of 90199129 is about 448.4707414379.

The spelling of 90199129 in words is "ninety million, one hundred ninety-nine thousand, one hundred twenty-nine".