490099681 has 32 divisors (see below), whose sum is σ = 559785600. Its totient is φ = 426746880.

The previous prime is 490099657. The next prime is 490099693. The reversal of 490099681 is 186990094.

It is a 3-Lehmer number, since φ(490099681) divides (490099681-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 490099681 - 2²⁵ = 456545249 is a prime.

It is a super-2 number, since 2×490099681² = 480395394632603522, which contains 22 as substring.

It is a deceptive number, since it divides R_490099680.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (490099601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1292950 + ... + 1293328.

It is an arithmetic number, because the mean of its divisors is an integer number (17493300).

It is a Poulet number, since it divides 2^490099680-1.

Almost surely, 2^490099681 is an apocalyptic number.

It is an amenable number.

490099681 is a deficient number, since it is larger than the sum of its proper divisors (69685919).

490099681 is a wasteful number, since it uses less digits than its factorization.

490099681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529.

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 490099681 is about 22138.1950709628. The cubic root of 490099681 is about 788.4269724548.

The spelling of 490099681 in words is "four hundred ninety million, ninety-nine thousand, six hundred eighty-one".