90331429 has 2 divisors, whose sum is σ = 90331430. Its totient is φ = 90331428.

The previous prime is 90331403. The next prime is 90331447. The reversal of 90331429 is 92413309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66341025 + 23990404 = 8145^2 + 4898^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90331429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90331429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90331459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45165714 + 45165715.

It is an arithmetic number, because the mean of its divisors is an integer number (45165715).

Almost surely, 2^90331429 is an apocalyptic number.

It is an amenable number.

90331429 is a deficient number, since it is larger than the sum of its proper divisors (1).

90331429 is an equidigital number, since it uses as much as digits as its factorization.

90331429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 90331429 is about 9504.2847705653. The cubic root of 90331429 is about 448.6898998508.

The spelling of 90331429 in words is "ninety million, three hundred thirty-one thousand, four hundred twenty-nine".