191006351 has 2 divisors, whose sum is σ = 191006352. Its totient is φ = 191006350.

The previous prime is 191006327. The next prime is 191006353. The reversal of 191006351 is 153600191.

191006351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 191006351 - 2¹⁸ = 190744207 is a prime.

It is a super-2 number, since 2×191006351² = 72966852244670402, which contains 22 as substring.

Together with 191006353, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 191006351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191006353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95503175 + 95503176.

It is an arithmetic number, because the mean of its divisors is an integer number (95503176).

Almost surely, 2^191006351 is an apocalyptic number.

191006351 is a deficient number, since it is larger than the sum of its proper divisors (1).

191006351 is an equidigital number, since it uses as much as digits as its factorization.

191006351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 191006351 is about 13820.5047302911. The cubic root of 191006351 is about 575.9029050829.

The spelling of 191006351 in words is "one hundred ninety-one million, six thousand, three hundred fifty-one".