985383557 has 2 divisors, whose sum is σ = 985383558. Its totient is φ = 985383556.

The previous prime is 985383551. The next prime is 985383583. The reversal of 985383557 is 755383589.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 857376961 + 128006596 = 29281^2 + 11314^2 .

It is a cyclic number.

It is not a de Polignac number, because 985383557 - 2⁶ = 985383493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 985383499 and 985383508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985383551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492691778 + 492691779.

It is an arithmetic number, because the mean of its divisors is an integer number (492691779).

Almost surely, 2^985383557 is an apocalyptic number.

It is an amenable number.

985383557 is a deficient number, since it is larger than the sum of its proper divisors (1).

985383557 is an equidigital number, since it uses as much as digits as its factorization.

985383557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 53.

The square root of 985383557 is about 31390.8196293120. The cubic root of 985383557 is about 995.1039198548.

The spelling of 985383557 in words is "nine hundred eighty-five million, three hundred eighty-three thousand, five hundred fifty-seven".