981323153 has 4 divisors (see below), whose sum is σ = 1032971760. Its totient is φ = 929674548.

The previous prime is 981323149. The next prime is 981323173. The reversal of 981323153 is 351323189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 981323153 - 2² = 981323149 is a prime.

It is a super-2 number, since 2×981323153² = 1925990261227722818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981323173) 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, 25824275 + ... + 25824312.

It is an arithmetic number, because the mean of its divisors is an integer number (258242940).

Almost surely, 2^981323153 is an apocalyptic number.

It is an amenable number.

981323153 is a deficient number, since it is larger than the sum of its proper divisors (51648607).

981323153 is a wasteful number, since it uses less digits than its factorization.

981323153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51648606.

The product of its digits is 19440, while the sum is 35.

The square root of 981323153 is about 31326.0778425899. The cubic root of 981323153 is about 993.7352188089.

The spelling of 981323153 in words is "nine hundred eighty-one million, three hundred twenty-three thousand, one hundred fifty-three".