138766097 has 2 divisors, whose sum is σ = 138766098. Its totient is φ = 138766096.

The previous prime is 138766079. The next prime is 138766127. The reversal of 138766097 is 790667831.

Together with previous prime (138766079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 137921536 + 844561 = 11744^2 + 919^2 .

It is a cyclic number.

It is not a de Polignac number, because 138766097 - 2²⁰ = 137717521 is a prime.

It is a super-2 number, since 2×138766097² = 38512059353226818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (138766037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69383048 + 69383049.

It is an arithmetic number, because the mean of its divisors is an integer number (69383049).

Almost surely, 2^138766097 is an apocalyptic number.

It is an amenable number.

138766097 is a deficient number, since it is larger than the sum of its proper divisors (1).

138766097 is an equidigital number, since it uses as much as digits as its factorization.

138766097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 138766097 is about 11779.9022491700. The cubic root of 138766097 is about 517.7194221477.

The spelling of 138766097 in words is "one hundred thirty-eight million, seven hundred sixty-six thousand, ninety-seven".