138797273 has 2 divisors, whose sum is σ = 138797274. Its totient is φ = 138797272.

The previous prime is 138797213. The next prime is 138797287. The reversal of 138797273 is 372797831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70023424 + 68773849 = 8368^2 + 8293^2 .

It is a cyclic number.

It is not a de Polignac number, because 138797273 - 2¹⁰ = 138796249 is a prime.

It is not a weakly prime, because it can be changed into another prime (138797213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69398636 + 69398637.

It is an arithmetic number, because the mean of its divisors is an integer number (69398637).

Almost surely, 2^138797273 is an apocalyptic number.

It is an amenable number.

138797273 is a deficient number, since it is larger than the sum of its proper divisors (1).

138797273 is an equidigital number, since it uses as much as digits as its factorization.

138797273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 47.

The square root of 138797273 is about 11781.2254455978. The cubic root of 138797273 is about 517.7581905320.

The spelling of 138797273 in words is "one hundred thirty-eight million, seven hundred ninety-seven thousand, two hundred seventy-three".