90402329 has 2 divisors, whose sum is σ = 90402330. Its totient is φ = 90402328.

The previous prime is 90402289. The next prime is 90402349. The reversal of 90402329 is 92320409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71436304 + 18966025 = 8452^2 + 4355^2 .

It is an emirp because it is prime and its reverse (92320409) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90402329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90402349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45201164 + 45201165.

It is an arithmetic number, because the mean of its divisors is an integer number (45201165).

Almost surely, 2^90402329 is an apocalyptic number.

It is an amenable number.

90402329 is a deficient number, since it is larger than the sum of its proper divisors (1).

90402329 is an equidigital number, since it uses as much as digits as its factorization.

90402329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 90402329 is about 9508.0139356229. The cubic root of 90402329 is about 448.8072595004.

The spelling of 90402329 in words is "ninety million, four hundred two thousand, three hundred twenty-nine".