138072673 has 2 divisors, whose sum is σ = 138072674. Its totient is φ = 138072672.

The previous prime is 138072659. The next prime is 138072689. The reversal of 138072673 is 376270831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88679889 + 49392784 = 9417^2 + 7028^2 .

It is a cyclic number.

It is not a de Polignac number, because 138072673 - 2²⁵ = 104518241 is a prime.

It is equal to p_7809364 and since 138072673 and 7809364 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 (138072643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69036336 + 69036337.

It is an arithmetic number, because the mean of its divisors is an integer number (69036337).

Almost surely, 2^138072673 is an apocalyptic number.

It is an amenable number.

138072673 is a deficient number, since it is larger than the sum of its proper divisors (1).

138072673 is an equidigital number, since it uses as much as digits as its factorization.

138072673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 138072673 is about 11750.4328856430. The cubic root of 138072673 is about 516.8556215335.

The spelling of 138072673 in words is "one hundred thirty-eight million, seventy-two thousand, six hundred seventy-three".