138498307 has 2 divisors, whose sum is σ = 138498308. Its totient is φ = 138498306.

The previous prime is 138498299. The next prime is 138498323. The reversal of 138498307 is 703894831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138498307 - 2³ = 138498299 is a prime.

It is not a weakly prime, because it can be changed into another prime (138498377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69249153 + 69249154.

It is an arithmetic number, because the mean of its divisors is an integer number (69249154).

Almost surely, 2^138498307 is an apocalyptic number.

138498307 is a deficient number, since it is larger than the sum of its proper divisors (1).

138498307 is an equidigital number, since it uses as much as digits as its factorization.

138498307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 138498307 is about 11768.5303670424. The cubic root of 138498307 is about 517.3861770562.

The spelling of 138498307 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, three hundred seven".