138429297 has 8 divisors (see below), whose sum is σ = 205080480. Its totient is φ = 92286180.

The previous prime is 138429289. The next prime is 138429329. The reversal of 138429297 is 792924831.

138429297 is a `hidden beast` number, since 138 + 429 + 2 + 97 = 666.

It is not a de Polignac number, because 138429297 - 2³ = 138429289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138429227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2563479 + ... + 2563532.

It is an arithmetic number, because the mean of its divisors is an integer number (25635060).

Almost surely, 2^138429297 is an apocalyptic number.

It is an amenable number.

138429297 is a deficient number, since it is larger than the sum of its proper divisors (66651183).

138429297 is an equidigital number, since it uses as much as digits as its factorization.

138429297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127020 (or 5127014 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 138429297 is about 11765.5980298496. The cubic root of 138429297 is about 517.3002295508.

The spelling of 138429297 in words is "one hundred thirty-eight million, four hundred twenty-nine thousand, two hundred ninety-seven".