138332769 has 4 divisors (see below), whose sum is σ = 184443696. Its totient is φ = 92221844.

The previous prime is 138332693. The next prime is 138332783. The reversal of 138332769 is 967233831.

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.

It is a cyclic number.

It is not a de Polignac number, because 138332769 - 2⁷ = 138332641 is a prime.

It is a super-2 number, since 2×138332769² = 38271909958414722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138332769.

It is not an unprimeable number, because it can be changed into a prime (138332669) 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, 23055459 + ... + 23055464.

It is an arithmetic number, because the mean of its divisors is an integer number (46110924).

Almost surely, 2^138332769 is an apocalyptic number.

It is an amenable number.

138332769 is a deficient number, since it is larger than the sum of its proper divisors (46110927).

138332769 is an equidigital number, since it uses as much as digits as its factorization.

138332769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46110926.

The product of its digits is 163296, while the sum is 42.

The square root of 138332769 is about 11761.4951855621. The cubic root of 138332769 is about 517.1799622168.

The spelling of 138332769 in words is "one hundred thirty-eight million, three hundred thirty-two thousand, seven hundred sixty-nine".