985154779 has 8 divisors (see below), whose sum is σ = 1129736160. Its totient is φ = 841534656.

The previous prime is 985154761. The next prime is 985154839. The reversal of 985154779 is 977451589.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 985154779 - 2²³ = 976766171 is a prime.

It is not an unprimeable number, because it can be changed into a prime (985154479) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238114 + ... + 242215.

It is an arithmetic number, because the mean of its divisors is an integer number (141217020).

Almost surely, 2^985154779 is an apocalyptic number.

985154779 is a deficient number, since it is larger than the sum of its proper divisors (144581381).

985154779 is a wasteful number, since it uses less digits than its factorization.

985154779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480629.

The product of its digits is 3175200, while the sum is 55.

The square root of 985154779 is about 31387.1753905954. The cubic root of 985154779 is about 995.0269022970.

The spelling of 985154779 in words is "nine hundred eighty-five million, one hundred fifty-four thousand, seven hundred seventy-nine".