90838669 has 2 divisors, whose sum is σ = 90838670. Its totient is φ = 90838668.

The previous prime is 90838621. The next prime is 90838673. The reversal of 90838669 is 96683809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74597769 + 16240900 = 8637^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 90838669 - 2⁷ = 90838541 is a prime.

It is a super-2 number, since 2×90838669² = 16503327571383122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90838609) 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, 45419334 + 45419335.

It is an arithmetic number, because the mean of its divisors is an integer number (45419335).

Almost surely, 2^90838669 is an apocalyptic number.

It is an amenable number.

90838669 is a deficient number, since it is larger than the sum of its proper divisors (1).

90838669 is an equidigital number, since it uses as much as digits as its factorization.

90838669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 90838669 is about 9530.9322209320. The cubic root of 90838669 is about 449.5281787232.

The spelling of 90838669 in words is "ninety million, eight hundred thirty-eight thousand, six hundred sixty-nine".