138470537 has 8 divisors (see below), whose sum is σ = 146873760. Its totient is φ = 130178880.

The previous prime is 138470533. The next prime is 138470569. The reversal of 138470537 is 735074831.

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

It is not a de Polignac number, because 138470537 - 2² = 138470533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138470537.

It is not an unprimeable number, because it can be changed into a prime (138470531) 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, 25328 + ... + 30305.

It is an arithmetic number, because the mean of its divisors is an integer number (18359220).

Almost surely, 2^138470537 is an apocalyptic number.

It is an amenable number.

138470537 is a deficient number, since it is larger than the sum of its proper divisors (8403223).

138470537 is a wasteful number, since it uses less digits than its factorization.

138470537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55783.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 138470537 is about 11767.3504664389. The cubic root of 138470537 is about 517.3515947454.

The spelling of 138470537 in words is "one hundred thirty-eight million, four hundred seventy thousand, five hundred thirty-seven".