138894697 has 2 divisors, whose sum is σ = 138894698. Its totient is φ = 138894696.

The previous prime is 138894661. The next prime is 138894703. The reversal of 138894697 is 796498831.

138894697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138862656 + 32041 = 11784^2 + 179^2 .

It is a cyclic number.

It is not a de Polignac number, because 138894697 - 2¹⁵ = 138861929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138894797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69447348 + 69447349.

It is an arithmetic number, because the mean of its divisors is an integer number (69447349).

Almost surely, 2^138894697 is an apocalyptic number.

It is an amenable number.

138894697 is a deficient number, since it is larger than the sum of its proper divisors (1).

138894697 is an equidigital number, since it uses as much as digits as its factorization.

138894697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 138894697 is about 11785.3594344848. The cubic root of 138894697 is about 517.8793030857.

The spelling of 138894697 in words is "one hundred thirty-eight million, eight hundred ninety-four thousand, six hundred ninety-seven".