102047191 has 2 divisors, whose sum is σ = 102047192. Its totient is φ = 102047190.

The previous prime is 102047177. The next prime is 102047219. The reversal of 102047191 is 191740201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102047191 - 2⁷ = 102047063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102047171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51023595 + 51023596.

It is an arithmetic number, because the mean of its divisors is an integer number (51023596).

Almost surely, 2^102047191 is an apocalyptic number.

102047191 is a deficient number, since it is larger than the sum of its proper divisors (1).

102047191 is an equidigital number, since it uses as much as digits as its factorization.

102047191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 102047191 is about 10101.8409708330. The cubic root of 102047191 is about 467.3049178910.

Adding to 102047191 its reverse (191740201), we get a palindrome (293787392).

The spelling of 102047191 in words is "one hundred two million, forty-seven thousand, one hundred ninety-one".