981361785 has 16 divisors (see below), whose sum is σ = 1571978304. Its totient is φ = 522793152.

The previous prime is 981361783. The next prime is 981361807. The reversal of 981361785 is 587163189.

It is not a de Polignac number, because 981361785 - 2¹ = 981361783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981361783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23802 + ... + 50291.

It is an arithmetic number, because the mean of its divisors is an integer number (98248644).

Almost surely, 2^981361785 is an apocalyptic number.

It is an amenable number.

981361785 is a deficient number, since it is larger than the sum of its proper divisors (590616519).

981361785 is a wasteful number, since it uses less digits than its factorization.

981361785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74984.

The product of its digits is 362880, while the sum is 48.

The square root of 981361785 is about 31326.6944473878. The cubic root of 981361785 is about 993.7482588475.

The spelling of 981361785 in words is "nine hundred eighty-one million, three hundred sixty-one thousand, seven hundred eighty-five".