487621817 has 2 divisors, whose sum is σ = 487621818. Its totient is φ = 487621816.

The previous prime is 487621769. The next prime is 487621867. The reversal of 487621817 is 718126784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277255801 + 210366016 = 16651^2 + 14504^2 .

It is a cyclic number.

It is not a de Polignac number, because 487621817 - 2¹⁶ = 487556281 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (487621867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243810908 + 243810909.

It is an arithmetic number, because the mean of its divisors is an integer number (243810909).

Almost surely, 2^487621817 is an apocalyptic number.

It is an amenable number.

487621817 is a deficient number, since it is larger than the sum of its proper divisors (1).

487621817 is an equidigital number, since it uses as much as digits as its factorization.

487621817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 150528, while the sum is 44.

The square root of 487621817 is about 22082.1606053393. The cubic root of 487621817 is about 787.0960075156.

The spelling of 487621817 in words is "four hundred eighty-seven million, six hundred twenty-one thousand, eight hundred seventeen".