138780633 has 4 divisors (see below), whose sum is σ = 185040848. Its totient is φ = 92520420.

The previous prime is 138780559. The next prime is 138780671. The reversal of 138780633 is 336087831.

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 not a de Polignac number, because 138780633 - 2¹² = 138776537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138780591 and 138780600.

It is not an unprimeable number, because it can be changed into a prime (138780133) 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, 23130103 + ... + 23130108.

It is an arithmetic number, because the mean of its divisors is an integer number (46260212).

Almost surely, 2^138780633 is an apocalyptic number.

It is an amenable number.

138780633 is a deficient number, since it is larger than the sum of its proper divisors (46260215).

138780633 is an equidigital number, since it uses as much as digits as its factorization.

138780633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46260214.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 138780633 is about 11780.5192160617. The cubic root of 138780633 is about 517.7374988656.

The spelling of 138780633 in words is "one hundred thirty-eight million, seven hundred eighty thousand, six hundred thirty-three".