985723537 has 2 divisors, whose sum is σ = 985723538. Its totient is φ = 985723536.

The previous prime is 985723511. The next prime is 985723559. The reversal of 985723537 is 735327589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972878481 + 12845056 = 31191^2 + 3584^2 .

It is an emirp because it is prime and its reverse (735327589) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985723537 is a prime.

It is a super-3 number, since 3×985723537³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (985723577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492861768 + 492861769.

It is an arithmetic number, because the mean of its divisors is an integer number (492861769).

Almost surely, 2^985723537 is an apocalyptic number.

It is an amenable number.

985723537 is a deficient number, since it is larger than the sum of its proper divisors (1).

985723537 is an equidigital number, since it uses as much as digits as its factorization.

985723537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587600, while the sum is 49.

The square root of 985723537 is about 31396.2344398178. The cubic root of 985723537 is about 995.2183512783.

The spelling of 985723537 in words is "nine hundred eighty-five million, seven hundred twenty-three thousand, five hundred thirty-seven".