191895941 has 2 divisors, whose sum is σ = 191895942. Its totient is φ = 191895940.

The previous prime is 191895931. The next prime is 191895943. The reversal of 191895941 is 149598191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191822500 + 73441 = 13850^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 191895941 - 2¹⁰ = 191894917 is a prime.

Together with 191895943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191895943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95947970 + 95947971.

It is an arithmetic number, because the mean of its divisors is an integer number (95947971).

Almost surely, 2^191895941 is an apocalyptic number.

It is an amenable number.

191895941 is a deficient number, since it is larger than the sum of its proper divisors (1).

191895941 is an equidigital number, since it uses as much as digits as its factorization.

191895941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 116640, while the sum is 47.

The square root of 191895941 is about 13852.6510459190. The cubic root of 191895941 is about 576.7955877277.

The spelling of 191895941 in words is "one hundred ninety-one million, eight hundred ninety-five thousand, nine hundred forty-one".