191061523 has 2 divisors, whose sum is σ = 191061524. Its totient is φ = 191061522.

The previous prime is 191061509. The next prime is 191061539. The reversal of 191061523 is 325160191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191061523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191061491 and 191061500.

It is not a weakly prime, because it can be changed into another prime (191061553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95530761 + 95530762.

It is an arithmetic number, because the mean of its divisors is an integer number (95530762).

Almost surely, 2^191061523 is an apocalyptic number.

191061523 is a deficient number, since it is larger than the sum of its proper divisors (1).

191061523 is an equidigital number, since it uses as much as digits as its factorization.

191061523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 191061523 is about 13822.5006058962. The cubic root of 191061523 is about 575.9583494108.

The spelling of 191061523 in words is "one hundred ninety-one million, sixty-one thousand, five hundred twenty-three".