985663537 has 2 divisors, whose sum is σ = 985663538. Its totient is φ = 985663536.

The previous prime is 985663477. The next prime is 985663583. The reversal of 985663537 is 735366589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 978688656 + 6974881 = 31284^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 985663537 - 2⁷ = 985663409 is a prime.

It is not a weakly prime, because it can be changed into another prime (985663037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492831768 + 492831769.

It is an arithmetic number, because the mean of its divisors is an integer number (492831769).

Almost surely, 2^985663537 is an apocalyptic number.

It is an amenable number.

985663537 is a deficient number, since it is larger than the sum of its proper divisors (1).

985663537 is an equidigital number, since it uses as much as digits as its factorization.

985663537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 52.

The square root of 985663537 is about 31395.2788966749. The cubic root of 985663537 is about 995.1981582220.

The spelling of 985663537 in words is "nine hundred eighty-five million, six hundred sixty-three thousand, five hundred thirty-seven".