138429347 has 8 divisors (see below), whose sum is σ = 158313216. Its totient is φ = 118572552.

The previous prime is 138429337. The next prime is 138429359. The reversal of 138429347 is 743924831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138429347 - 2⁴ = 138429331 is a prime.

It is a super-2 number, since 2×138429347² = 38325368221692818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138429337) 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, 5738 + ... + 17600.

It is an arithmetic number, because the mean of its divisors is an integer number (19789152).

Almost surely, 2^138429347 is an apocalyptic number.

138429347 is a deficient number, since it is larger than the sum of its proper divisors (19883869).

138429347 is a wasteful number, since it uses less digits than its factorization.

138429347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13537.

The product of its digits is 145152, while the sum is 41.

The square root of 138429347 is about 11765.6001546882. The cubic root of 138429347 is about 517.3002918329.

The spelling of 138429347 in words is "one hundred thirty-eight million, four hundred twenty-nine thousand, three hundred forty-seven".