981611153 has 2 divisors, whose sum is σ = 981611154. Its totient is φ = 981611152.

The previous prime is 981611131. The next prime is 981611179. The reversal of 981611153 is 351116189.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 920333569 + 61277584 = 30337^2 + 7828^2 .

It is a cyclic number.

It is not a de Polignac number, because 981611153 - 2²⁰ = 980562577 is a prime.

It is not a weakly prime, because it can be changed into another prime (981611123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490805576 + 490805577.

It is an arithmetic number, because the mean of its divisors is an integer number (490805577).

Almost surely, 2^981611153 is an apocalyptic number.

It is an amenable number.

981611153 is a deficient number, since it is larger than the sum of its proper divisors (1).

981611153 is an equidigital number, since it uses as much as digits as its factorization.

981611153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 35.

The square root of 981611153 is about 31330.6743144797. The cubic root of 981611153 is about 993.8324235367.

The spelling of 981611153 in words is "nine hundred eighty-one million, six hundred eleven thousand, one hundred fifty-three".