487946191 has 2 divisors, whose sum is σ = 487946192. Its totient is φ = 487946190.

The previous prime is 487946177. The next prime is 487946227. The reversal of 487946191 is 191649784.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487946191 is a prime.

It is a super-2 number, since 2×487946191² = 476182970622816962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487946131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243973095 + 243973096.

It is an arithmetic number, because the mean of its divisors is an integer number (243973096).

Almost surely, 2^487946191 is an apocalyptic number.

487946191 is a deficient number, since it is larger than the sum of its proper divisors (1).

487946191 is an equidigital number, since it uses as much as digits as its factorization.

487946191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 487946191 is about 22089.5040913100. The cubic root of 487946191 is about 787.2704985381.

The spelling of 487946191 in words is "four hundred eighty-seven million, nine hundred forty-six thousand, one hundred ninety-one".