981121953 has 12 divisors (see below), whose sum is σ = 1521740400. Its totient is φ = 560641032.

The previous prime is 981121951. The next prime is 981122029. The reversal of 981121953 is 359121189.

It is not a de Polignac number, because 981121953 - 2¹ = 981121951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (981121951) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3337003 + ... + 3337296.

It is an arithmetic number, because the mean of its divisors is an integer number (126811700).

Almost surely, 2^981121953 is an apocalyptic number.

It is an amenable number.

981121953 is a deficient number, since it is larger than the sum of its proper divisors (540618447).

981121953 is a wasteful number, since it uses less digits than its factorization.

981121953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674316 (or 6674309 counting only the distinct ones).

The product of its digits is 19440, while the sum is 39.

The square root of 981121953 is about 31322.8662960464. The cubic root of 981121953 is about 993.6672992212.

The spelling of 981121953 in words is "nine hundred eighty-one million, one hundred twenty-one thousand, nine hundred fifty-three".