191410561 has 2 divisors, whose sum is σ = 191410562. Its totient is φ = 191410560.

The previous prime is 191410553. The next prime is 191410589. The reversal of 191410561 is 165014191.

It is an a-pointer prime, because the next prime (191410589) can be obtained adding 191410561 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103632400 + 87778161 = 10180^2 + 9369^2 .

It is a cyclic number.

It is not a de Polignac number, because 191410561 - 2³ = 191410553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191410511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95705280 + 95705281.

It is an arithmetic number, because the mean of its divisors is an integer number (95705281).

Almost surely, 2^191410561 is an apocalyptic number.

It is an amenable number.

191410561 is a deficient number, since it is larger than the sum of its proper divisors (1).

191410561 is an equidigital number, since it uses as much as digits as its factorization.

191410561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 191410561 is about 13835.1205632622. The cubic root of 191410561 is about 576.3088631341.

The spelling of 191410561 in words is "one hundred ninety-one million, four hundred ten thousand, five hundred sixty-one".