338720497 has 2 divisors, whose sum is σ = 338720498. Its totient is φ = 338720496.

The previous prime is 338720441. The next prime is 338720513. The reversal of 338720497 is 794027833.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 312547041 + 26173456 = 17679^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 338720497 - 2¹¹ = 338718449 is a prime.

It is a super-2 number, since 2×338720497² = 229463150175854018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338720897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169360248 + 169360249.

It is an arithmetic number, because the mean of its divisors is an integer number (169360249).

Almost surely, 2^338720497 is an apocalyptic number.

It is an amenable number.

338720497 is a deficient number, since it is larger than the sum of its proper divisors (1).

338720497 is an equidigital number, since it uses as much as digits as its factorization.

338720497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 43.

The square root of 338720497 is about 18404.3608147634. The cubic root of 338720497 is about 697.0765813564.

The spelling of 338720497 in words is "three hundred thirty-eight million, seven hundred twenty thousand, four hundred ninety-seven".