487117261 has 2 divisors, whose sum is σ = 487117262. Its totient is φ = 487117260.

The previous prime is 487117217. The next prime is 487117327. The reversal of 487117261 is 162711784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 384905161 + 102212100 = 19619^2 + 10110^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487117261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 487117261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487117061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243558630 + 243558631.

It is an arithmetic number, because the mean of its divisors is an integer number (243558631).

Almost surely, 2^487117261 is an apocalyptic number.

It is an amenable number.

487117261 is a deficient number, since it is larger than the sum of its proper divisors (1).

487117261 is an equidigital number, since it uses as much as digits as its factorization.

487117261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 37.

The square root of 487117261 is about 22070.7331323633. The cubic root of 487117261 is about 786.8244370393.

The spelling of 487117261 in words is "four hundred eighty-seven million, one hundred seventeen thousand, two hundred sixty-one".