138667097 has 2 divisors, whose sum is σ = 138667098. Its totient is φ = 138667096.

The previous prime is 138667093. The next prime is 138667103. The reversal of 138667097 is 790766831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111429136 + 27237961 = 10556^2 + 5219^2 .

It is a cyclic number.

It is not a de Polignac number, because 138667097 - 2² = 138667093 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138667093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69333548 + 69333549.

It is an arithmetic number, because the mean of its divisors is an integer number (69333549).

Almost surely, 2^138667097 is an apocalyptic number.

It is an amenable number.

138667097 is a deficient number, since it is larger than the sum of its proper divisors (1).

138667097 is an equidigital number, since it uses as much as digits as its factorization.

138667097 is an evil number, because the sum of its binary digits is even.

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

The square root of 138667097 is about 11775.6994272103. The cubic root of 138667097 is about 517.5962738728.

The spelling of 138667097 in words is "one hundred thirty-eight million, six hundred sixty-seven thousand, ninety-seven".