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990523 is a prime number
BaseRepresentation
bin11110001110100111011
31212022202001
43301310323
5223144043
633121431
711263552
oct3616473
91768661
10990523
11617216
123b9277
13288b11
141bad99
1514874d
hexf1d3b

990523 has 2 divisors, whose sum is σ = 990524. Its totient is φ = 990522.

The previous prime is 990511. The next prime is 990529. The reversal of 990523 is 325099.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-990523 is a prime.

It is a super-2 number, since 2×9905232 = 1962271627058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 990491 and 990500.

It is not a weakly prime, because it can be changed into another prime (990529) 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, 495261 + 495262.

It is an arithmetic number, because the mean of its divisors is an integer number (495262).

2990523 is an apocalyptic number.

990523 is a deficient number, since it is larger than the sum of its proper divisors (1).

990523 is an equidigital number, since it uses as much as digits as its factorization.

990523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 990523 is about 995.2502197940. The cubic root of 990523 is about 99.6830967844.

The spelling of 990523 in words is "nine hundred ninety thousand, five hundred twenty-three".