1085859997 has 2 divisors, whose sum is σ = 1085859998. Its totient is φ = 1085859996.

The previous prime is 1085859967. The next prime is 1085860007. The reversal of 1085859997 is 7999585801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 939667716 + 146192281 = 30654^2 + 12091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1085859997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1085859967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542929998 + 542929999.

It is an arithmetic number, because the mean of its divisors is an integer number (542929999).

Almost surely, 2^1085859997 is an apocalyptic number.

It is an amenable number.

1085859997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1085859997 is an equidigital number, since it uses as much as digits as its factorization.

1085859997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8164800, while the sum is 61.

The square root of 1085859997 is about 32952.3898526344. The cubic root of 1085859997 is about 1027.8378615149.

The spelling of 1085859997 in words is "one billion, eighty-five million, eight hundred fifty-nine thousand, nine hundred ninety-seven".