490136869 has 2 divisors, whose sum is σ = 490136870. Its totient is φ = 490136868.

The previous prime is 490136861. The next prime is 490136873. The reversal of 490136869 is 968631094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418734369 + 71402500 = 20463^2 + 8450^2 .

It is a cyclic number.

It is not a de Polignac number, because 490136869 - 2³ = 490136861 is a prime.

It is a super-2 number, since 2×490136869² = 480468300706246322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (490136861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245068434 + 245068435.

It is an arithmetic number, because the mean of its divisors is an integer number (245068435).

Almost surely, 2^490136869 is an apocalyptic number.

It is an amenable number.

490136869 is a deficient number, since it is larger than the sum of its proper divisors (1).

490136869 is an equidigital number, since it uses as much as digits as its factorization.

490136869 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 490136869 is about 22139.0349609011. The cubic root of 490136869 is about 788.4469134871.

The spelling of 490136869 in words is "four hundred ninety million, one hundred thirty-six thousand, eight hundred sixty-nine".