138486649 has 8 divisors (see below), whose sum is σ = 166600640. Its totient is φ = 112455216.

The previous prime is 138486637. The next prime is 138486661. The reversal of 138486649 is 946684831.

It is an interprime number because it is at equal distance from previous prime (138486637) and next prime (138486661).

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 138486649 - 2¹⁵ = 138453881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138486679) 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, 520494 + ... + 520759.

It is an arithmetic number, because the mean of its divisors is an integer number (20825080).

Almost surely, 2^138486649 is an apocalyptic number.

138486649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

138486649 is a deficient number, since it is larger than the sum of its proper divisors (28113991).

138486649 is a wasteful number, since it uses less digits than its factorization.

138486649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041279.

The product of its digits is 995328, while the sum is 49.

The square root of 138486649 is about 11768.0350526330. The cubic root of 138486649 is about 517.3716597734.

The spelling of 138486649 in words is "one hundred thirty-eight million, four hundred eighty-six thousand, six hundred forty-nine".