138677093 has 2 divisors, whose sum is σ = 138677094. Its totient is φ = 138677092.

The previous prime is 138677087. The next prime is 138677137. The reversal of 138677093 is 390776831.

It is an a-pointer prime, because the next prime (138677137) can be obtained adding 138677093 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83576164 + 55100929 = 9142^2 + 7423^2 .

It is a cyclic number.

It is not a de Polignac number, because 138677093 - 2²⁶ = 71568229 is a prime.

It is a super-2 number, since 2×138677093² = 38462672245861298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138677083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69338546 + 69338547.

It is an arithmetic number, because the mean of its divisors is an integer number (69338547).

Almost surely, 2^138677093 is an apocalyptic number.

It is an amenable number.

138677093 is a deficient number, since it is larger than the sum of its proper divisors (1).

138677093 is an equidigital number, since it uses as much as digits as its factorization.

138677093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 138677093 is about 11776.1238529492. The cubic root of 138677093 is about 517.6087107766.

The spelling of 138677093 in words is "one hundred thirty-eight million, six hundred seventy-seven thousand, ninety-three".