90868439 has 2 divisors, whose sum is σ = 90868440. Its totient is φ = 90868438.

The previous prime is 90868403. The next prime is 90868487. The reversal of 90868439 is 93486809.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90868439 - 2¹² = 90864343 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 90868393 and 90868402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90868499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45434219 + 45434220.

It is an arithmetic number, because the mean of its divisors is an integer number (45434220).

Almost surely, 2^90868439 is an apocalyptic number.

90868439 is a deficient number, since it is larger than the sum of its proper divisors (1).

90868439 is an equidigital number, since it uses as much as digits as its factorization.

90868439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 90868439 is about 9532.4938499849. The cubic root of 90868439 is about 449.5772803976.

The spelling of 90868439 in words is "ninety million, eight hundred sixty-eight thousand, four hundred thirty-nine".