985140997 has 2 divisors, whose sum is σ = 985140998. Its totient is φ = 985140996.

The previous prime is 985140967. The next prime is 985141039. The reversal of 985140997 is 799041589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 714011841 + 271129156 = 26721^2 + 16466^2 .

It is a cyclic number.

It is not a de Polignac number, because 985140997 - 2⁷ = 985140869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985140967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492570498 + 492570499.

It is an arithmetic number, because the mean of its divisors is an integer number (492570499).

Almost surely, 2^985140997 is an apocalyptic number.

It is an amenable number.

985140997 is a deficient number, since it is larger than the sum of its proper divisors (1).

985140997 is an equidigital number, since it uses as much as digits as its factorization.

985140997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 985140997 is about 31386.9558415594. The cubic root of 985140997 is about 995.0222622394.

The spelling of 985140997 in words is "nine hundred eighty-five million, one hundred forty thousand, nine hundred ninety-seven".