654368191 has 2 divisors, whose sum is σ = 654368192. Its totient is φ = 654368190.

The previous prime is 654368149. The next prime is 654368249. The reversal of 654368191 is 191863456.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 654368191 - 2¹³ = 654359999 is a prime.

It is a super-2 number, since 2×654368191² = 856395458785224962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (654368591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327184095 + 327184096.

It is an arithmetic number, because the mean of its divisors is an integer number (327184096).

Almost surely, 2^654368191 is an apocalyptic number.

654368191 is a deficient number, since it is larger than the sum of its proper divisors (1).

654368191 is an equidigital number, since it uses as much as digits as its factorization.

654368191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 654368191 is about 25580.6213958926. The cubic root of 654368191 is about 868.1752351189.

The spelling of 654368191 in words is "six hundred fifty-four million, three hundred sixty-eight thousand, one hundred ninety-one".