981779601 has 24 divisors (see below), whose sum is σ = 1488493440. Its totient is φ = 574493920.

The previous prime is 981779581. The next prime is 981779611. The reversal of 981779601 is 106977189.

It is a happy number.

It is not a de Polignac number, because 981779601 - 2²⁵ = 948225169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (981779611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36105 + ... + 57158.

It is an arithmetic number, because the mean of its divisors is an integer number (62020560).

Almost surely, 2^981779601 is an apocalyptic number.

It is an amenable number.

981779601 is a deficient number, since it is larger than the sum of its proper divisors (506713839).

981779601 is a wasteful number, since it uses less digits than its factorization.

981779601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93317 (or 93306 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 48.

The square root of 981779601 is about 31333.3624272915. The cubic root of 981779601 is about 993.8892686899.

The spelling of 981779601 in words is "nine hundred eighty-one million, seven hundred seventy-nine thousand, six hundred one".