138700749 has 8 divisors (see below), whose sum is σ = 201746592. Its totient is φ = 84061040.

The previous prime is 138700747. The next prime is 138700759. The reversal of 138700749 is 947007831.

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

It is a cyclic number.

It is not a de Polignac number, because 138700749 - 2¹ = 138700747 is a prime.

It is a super-2 number, since 2×138700749² = 38475795546322002, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138700747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2101494 + ... + 2101559.

It is an arithmetic number, because the mean of its divisors is an integer number (25218324).

Almost surely, 2^138700749 is an apocalyptic number.

It is an amenable number.

138700749 is a deficient number, since it is larger than the sum of its proper divisors (63045843).

138700749 is a wasteful number, since it uses less digits than its factorization.

138700749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4203067.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 138700749 is about 11777.1282153163. The cubic root of 138700749 is about 517.6381409086.

The spelling of 138700749 in words is "one hundred thirty-eight million, seven hundred thousand, seven hundred forty-nine".