981475211 has 2 divisors, whose sum is σ = 981475212. Its totient is φ = 981475210.

The previous prime is 981475193. The next prime is 981475213. The reversal of 981475211 is 112574189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981475211 - 2²² = 977280907 is a prime.

Together with 981475213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981475213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490737605 + 490737606.

It is an arithmetic number, because the mean of its divisors is an integer number (490737606).

Almost surely, 2^981475211 is an apocalyptic number.

981475211 is a deficient number, since it is larger than the sum of its proper divisors (1).

981475211 is an equidigital number, since it uses as much as digits as its factorization.

981475211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 38.

The square root of 981475211 is about 31328.5047680224. The cubic root of 981475211 is about 993.7865432496.

The spelling of 981475211 in words is "nine hundred eighty-one million, four hundred seventy-five thousand, two hundred eleven".