981474191 has 2 divisors, whose sum is σ = 981474192. Its totient is φ = 981474190.

The previous prime is 981474157. The next prime is 981474211. The reversal of 981474191 is 191474189.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (191474189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981474191 - 2²² = 977279887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981474121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490737095 + 490737096.

It is an arithmetic number, because the mean of its divisors is an integer number (490737096).

Almost surely, 2^981474191 is an apocalyptic number.

981474191 is a deficient number, since it is larger than the sum of its proper divisors (1).

981474191 is an equidigital number, since it uses as much as digits as its factorization.

981474191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 981474191 is about 31328.4884889137. The cubic root of 981474191 is about 993.7861989846.

The spelling of 981474191 in words is "nine hundred eighty-one million, four hundred seventy-four thousand, one hundred ninety-one".