138286757 has 4 divisors (see below), whose sum is σ = 158042016. Its totient is φ = 118531500.

The previous prime is 138286739. The next prime is 138286763. The reversal of 138286757 is 757682831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 757682831 = 439 ⋅1725929.

It is a cyclic number.

It is not a de Polignac number, because 138286757 - 2¹⁴ = 138270373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138286717) 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 3 ways as a sum of consecutive naturals, for example, 9877619 + ... + 9877632.

It is an arithmetic number, because the mean of its divisors is an integer number (39510504).

Almost surely, 2^138286757 is an apocalyptic number.

It is an amenable number.

138286757 is a deficient number, since it is larger than the sum of its proper divisors (19755259).

138286757 is an equidigital number, since it uses as much as digits as its factorization.

138286757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755258.

The product of its digits is 564480, while the sum is 47.

The square root of 138286757 is about 11759.5389790587. The cubic root of 138286757 is about 517.1226146978.

The spelling of 138286757 in words is "one hundred thirty-eight million, two hundred eighty-six thousand, seven hundred fifty-seven".