985935551 has 2 divisors, whose sum is σ = 985935552. Its totient is φ = 985935550.

The previous prime is 985935547. The next prime is 985935583. The reversal of 985935551 is 155539589.

It is a weak prime.

It is an emirp because it is prime and its reverse (155539589) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 985935551 - 2² = 985935547 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 985935551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985935541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492967775 + 492967776.

It is an arithmetic number, because the mean of its divisors is an integer number (492967776).

Almost surely, 2^985935551 is an apocalyptic number.

985935551 is a deficient number, since it is larger than the sum of its proper divisors (1).

985935551 is an equidigital number, since it uses as much as digits as its factorization.

985935551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215000, while the sum is 50.

The square root of 985935551 is about 31399.6106822999. The cubic root of 985935551 is about 995.2896982263.

The spelling of 985935551 in words is "nine hundred eighty-five million, nine hundred thirty-five thousand, five hundred fifty-one".