85090829 has 2 divisors, whose sum is σ = 85090830. Its totient is φ = 85090828.

The previous prime is 85090813. The next prime is 85090847. The reversal of 85090829 is 92809058.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82537225 + 2553604 = 9085^2 + 1598^2 .

It is a cyclic number.

It is not a de Polignac number, because 85090829 - 2⁴ = 85090813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85090849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42545414 + 42545415.

It is an arithmetic number, because the mean of its divisors is an integer number (42545415).

Almost surely, 2^85090829 is an apocalyptic number.

It is an amenable number.

85090829 is a deficient number, since it is larger than the sum of its proper divisors (1).

85090829 is an equidigital number, since it uses as much as digits as its factorization.

85090829 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 85090829 is about 9224.4690362102. The cubic root of 85090829 is about 439.8395230895.

The spelling of 85090829 in words is "eighty-five million, ninety thousand, eight hundred twenty-nine".