138707767 has 8 divisors (see below), whose sum is σ = 152194320. Its totient is φ = 125367360.

The previous prime is 138707753. The next prime is 138707843. The reversal of 138707767 is 767707831.

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-138707767 is a prime.

It is a super-2 number, since 2×138707767² = 38479689252252578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138707707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34542 + ... + 38347.

It is an arithmetic number, because the mean of its divisors is an integer number (19024290).

Almost surely, 2^138707767 is an apocalyptic number.

138707767 is a deficient number, since it is larger than the sum of its proper divisors (13486553).

138707767 is a wasteful number, since it uses less digits than its factorization.

138707767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73073.

The product of its (nonzero) digits is 345744, while the sum is 46.

The square root of 138707767 is about 11777.4261619422. The cubic root of 138707767 is about 517.6468712705.

The spelling of 138707767 in words is "one hundred thirty-eight million, seven hundred seven thousand, seven hundred sixty-seven".