69138445 has 4 divisors (see below), whose sum is σ = 82966140. Its totient is φ = 55310752.

The previous prime is 69138413. The next prime is 69138449. The reversal of 69138445 is 54483196.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34880836 + 34257609 = 5906^2 + 5853^2 .

It is a cyclic number.

It is not a de Polignac number, because 69138445 - 2⁵ = 69138413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 69138398 and 69138407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69138449) 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, 6913840 + ... + 6913849.

It is an arithmetic number, because the mean of its divisors is an integer number (20741535).

Almost surely, 2^69138445 is an apocalyptic number.

It is an amenable number.

69138445 is a deficient number, since it is larger than the sum of its proper divisors (13827695).

69138445 is a wasteful number, since it uses less digits than its factorization.

69138445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13827694.

The product of its digits is 103680, while the sum is 40.

The square root of 69138445 is about 8314.9530966807. The cubic root of 69138445 is about 410.4307291714.

The spelling of 69138445 in words is "sixty-nine million, one hundred thirty-eight thousand, four hundred forty-five".