487541891 has 2 divisors, whose sum is σ = 487541892. Its totient is φ = 487541890.

The previous prime is 487541863. The next prime is 487541903. The reversal of 487541891 is 198145784.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487541891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (487541801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243770945 + 243770946.

It is an arithmetic number, because the mean of its divisors is an integer number (243770946).

Almost surely, 2^487541891 is an apocalyptic number.

487541891 is a deficient number, since it is larger than the sum of its proper divisors (1).

487541891 is an equidigital number, since it uses as much as digits as its factorization.

487541891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 322560, while the sum is 47.

The square root of 487541891 is about 22080.3507897859. The cubic root of 487541891 is about 787.0530009131.

The spelling of 487541891 in words is "four hundred eighty-seven million, five hundred forty-one thousand, eight hundred ninety-one".