138174497 has 2 divisors, whose sum is σ = 138174498. Its totient is φ = 138174496.

The previous prime is 138174481. The next prime is 138174511. The reversal of 138174497 is 794471831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129595456 + 8579041 = 11384^2 + 2929^2 .

It is an emirp because it is prime and its reverse (794471831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138174497 - 2⁴ = 138174481 is a prime.

It is not a weakly prime, because it can be changed into another prime (138174697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69087248 + 69087249.

It is an arithmetic number, because the mean of its divisors is an integer number (69087249).

Almost surely, 2^138174497 is an apocalyptic number.

It is an amenable number.

138174497 is a deficient number, since it is larger than the sum of its proper divisors (1).

138174497 is an equidigital number, since it uses as much as digits as its factorization.

138174497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 44.

The square root of 138174497 is about 11754.7648636627. The cubic root of 138174497 is about 516.9826449185.

The spelling of 138174497 in words is "one hundred thirty-eight million, one hundred seventy-four thousand, four hundred ninety-seven".