138776737 has 8 divisors (see below), whose sum is σ = 154249920. Its totient is φ = 123779760.

The previous prime is 138776719. The next prime is 138776749. The reversal of 138776737 is 737677831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138776737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138776707) 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, 118437 + ... + 119602.

It is an arithmetic number, because the mean of its divisors is an integer number (19281240).

Almost surely, 2^138776737 is an apocalyptic number.

It is an amenable number.

138776737 is a deficient number, since it is larger than the sum of its proper divisors (15473183).

138776737 is a wasteful number, since it uses less digits than its factorization.

138776737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238103.

The product of its digits is 1037232, while the sum is 49.

The square root of 138776737 is about 11780.3538571641. The cubic root of 138776737 is about 517.7326539913.

The spelling of 138776737 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, seven hundred thirty-seven".