985923997 has 2 divisors, whose sum is σ = 985923998. Its totient is φ = 985923996.

The previous prime is 985923989. The next prime is 985924019. The reversal of 985923997 is 799329589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 882921796 + 103002201 = 29714^2 + 10149^2 .

It is an emirp because it is prime and its reverse (799329589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985923997 - 2³ = 985923989 is a prime.

It is a super-2 number, since 2×985923997² = 1944092255720912018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985923937) 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, 492961998 + 492961999.

It is an arithmetic number, because the mean of its divisors is an integer number (492961999).

Almost surely, 2^985923997 is an apocalyptic number.

It is an amenable number.

985923997 is a deficient number, since it is larger than the sum of its proper divisors (1).

985923997 is an equidigital number, since it uses as much as digits as its factorization.

985923997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11022480, while the sum is 61.

The square root of 985923997 is about 31399.4266985880. The cubic root of 985923997 is about 995.2858103379.

It can be divided in two parts, 9859 and 23997, that added together give a square (33856 = 184²).

The spelling of 985923997 in words is "nine hundred eighty-five million, nine hundred twenty-three thousand, nine hundred ninety-seven".