138768049 has 6 divisors (see below), whose sum is σ = 161424114. Its totient is φ = 118944000.

The previous prime is 138768037. The next prime is 138768053. The reversal of 138768049 is 940867831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 107329600 + 31438449 = 10360^2 + 5607^2 .

It is not a de Polignac number, because 138768049 - 2⁹ = 138767537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138768029) 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 5 ways as a sum of consecutive naturals, for example, 1415952 + ... + 1416049.

It is an arithmetic number, because the mean of its divisors is an integer number (26904019).

Almost surely, 2^138768049 is an apocalyptic number.

It is an amenable number.

138768049 is a deficient number, since it is larger than the sum of its proper divisors (22656065).

138768049 is an equidigital number, since it uses as much as digits as its factorization.

138768049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2832015 (or 2832008 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 138768049 is about 11779.9851018582. The cubic root of 138768049 is about 517.7218496945.

The spelling of 138768049 in words is "one hundred thirty-eight million, seven hundred sixty-eight thousand, forty-nine".