490748681 has 2 divisors, whose sum is σ = 490748682. Its totient is φ = 490748680.

The previous prime is 490748623. The next prime is 490748683. The reversal of 490748681 is 186847094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278055625 + 212693056 = 16675^2 + 14584^2 .

It is a cyclic number.

It is not a de Polignac number, because 490748681 - 2⁶ = 490748617 is a prime.

It is a super-2 number, since 2×490748681² = 481668535806479522, which contains 22 as substring.

Together with 490748683, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_25893776 and since 490748681 and 25893776 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (490748683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245374340 + 245374341.

It is an arithmetic number, because the mean of its divisors is an integer number (245374341).

Almost surely, 2^490748681 is an apocalyptic number.

It is an amenable number.

490748681 is a deficient number, since it is larger than the sum of its proper divisors (1).

490748681 is an equidigital number, since it uses as much as digits as its factorization.

490748681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 490748681 is about 22152.8481464574. The cubic root of 490748681 is about 788.7748359800.

The spelling of 490748681 in words is "four hundred ninety million, seven hundred forty-eight thousand, six hundred eighty-one".