981135101 has 4 divisors (see below), whose sum is σ = 982286172. Its totient is φ = 979984032.

The previous prime is 981135083. The next prime is 981135119. The reversal of 981135101 is 101531189.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (981135083) and next prime (981135119).

It can be written as a sum of positive squares in 2 ways, for example, as 157502500 + 823632601 = 12550^2 + 28699^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-981135101 is a prime.

It is a super-3 number, since 3×981135101³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981135901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574256 + ... + 575961.

It is an arithmetic number, because the mean of its divisors is an integer number (245571543).

Almost surely, 2^981135101 is an apocalyptic number.

It is an amenable number.

981135101 is a deficient number, since it is larger than the sum of its proper divisors (1151071).

981135101 is a wasteful number, since it uses less digits than its factorization.

981135101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151070.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 981135101 is about 31323.0761739648. The cubic root of 981135101 is about 993.6717379080.

The spelling of 981135101 in words is "nine hundred eighty-one million, one hundred thirty-five thousand, one hundred one".