191097463 has 2 divisors, whose sum is σ = 191097464. Its totient is φ = 191097462.

The previous prime is 191097437. The next prime is 191097481. The reversal of 191097463 is 364790191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191097463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191097163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95548731 + 95548732.

It is an arithmetic number, because the mean of its divisors is an integer number (95548732).

Almost surely, 2^191097463 is an apocalyptic number.

191097463 is a deficient number, since it is larger than the sum of its proper divisors (1).

191097463 is an equidigital number, since it uses as much as digits as its factorization.

191097463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 191097463 is about 13823.8005989670. The cubic root of 191097463 is about 575.9944610691.

The spelling of 191097463 in words is "one hundred ninety-one million, ninety-seven thousand, four hundred sixty-three".