138892733 has 4 divisors (see below), whose sum is σ = 158734560. Its totient is φ = 119050908.

The previous prime is 138892729. The next prime is 138892751. The reversal of 138892733 is 337298831.

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 138892733 - 2² = 138892729 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 (138892333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9920903 + ... + 9920916.

It is an arithmetic number, because the mean of its divisors is an integer number (39683640).

Almost surely, 2^138892733 is an apocalyptic number.

It is an amenable number.

138892733 is a deficient number, since it is larger than the sum of its proper divisors (19841827).

138892733 is an equidigital number, since it uses as much as digits as its factorization.

138892733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19841826.

The product of its digits is 217728, while the sum is 44.

The square root of 138892733 is about 11785.2761104694. The cubic root of 138892733 is about 517.8768621004.

The spelling of 138892733 in words is "one hundred thirty-eight million, eight hundred ninety-two thousand, seven hundred thirty-three".