497229661 has 2 divisors, whose sum is σ = 497229662. Its totient is φ = 497229660.

The previous prime is 497229659. The next prime is 497229697. The reversal of 497229661 is 166922794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387105625 + 110124036 = 19675^2 + 10494^2 .

It is a cyclic number.

It is not a de Polignac number, because 497229661 - 2¹ = 497229659 is a prime.

Together with 497229659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (497029661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248614830 + 248614831.

It is an arithmetic number, because the mean of its divisors is an integer number (248614831).

Almost surely, 2^497229661 is an apocalyptic number.

It is an amenable number.

497229661 is a deficient number, since it is larger than the sum of its proper divisors (1).

497229661 is an equidigital number, since it uses as much as digits as its factorization.

497229661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 46.

The square root of 497229661 is about 22298.6470665823. The cubic root of 497229661 is about 792.2319306162.

The spelling of 497229661 in words is "four hundred ninety-seven million, two hundred twenty-nine thousand, six hundred sixty-one".