489660931 has 2 divisors, whose sum is σ = 489660932. Its totient is φ = 489660930.

The previous prime is 489660893. The next prime is 489660937. The reversal of 489660931 is 139066984.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489660931 is a prime.

It is a super-4 number, since 4×489660931⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (489660937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244830465 + 244830466.

It is an arithmetic number, because the mean of its divisors is an integer number (244830466).

Almost surely, 2^489660931 is an apocalyptic number.

489660931 is a deficient number, since it is larger than the sum of its proper divisors (1).

489660931 is an equidigital number, since it uses as much as digits as its factorization.

489660931 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 489660931 is about 22128.2835077644. The cubic root of 489660931 is about 788.1916287583.

The spelling of 489660931 in words is "four hundred eighty-nine million, six hundred sixty thousand, nine hundred thirty-one".