490874581 has 2 divisors, whose sum is σ = 490874582. Its totient is φ = 490874580.

The previous prime is 490874543. The next prime is 490874603. The reversal of 490874581 is 185478094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 464187025 + 26687556 = 21545^2 + 5166^2 .

It is a cyclic number.

It is not a de Polignac number, because 490874581 - 2⁷ = 490874453 is a prime.

It is a super-2 number, since 2×490874581² = 481915708543851122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490874981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245437290 + 245437291.

It is an arithmetic number, because the mean of its divisors is an integer number (245437291).

Almost surely, 2^490874581 is an apocalyptic number.

It is an amenable number.

490874581 is a deficient number, since it is larger than the sum of its proper divisors (1).

490874581 is an equidigital number, since it uses as much as digits as its factorization.

490874581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 322560, while the sum is 46.

The square root of 490874581 is about 22155.6895852961. The cubic root of 490874581 is about 788.8422827639.

The spelling of 490874581 in words is "four hundred ninety million, eight hundred seventy-four thousand, five hundred eighty-one".