138042069 has 16 divisors (see below), whose sum is σ = 202635840. Its totient is φ = 82892160.

The previous prime is 138042041. The next prime is 138042103. The reversal of 138042069 is 960240831.

138042069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138042069 - 2⁷ = 138041941 is a prime.

It is a super-2 number, since 2×138042069² = 38111225627601522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138042019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15592 + ... + 22785.

It is an arithmetic number, because the mean of its divisors is an integer number (12664740).

Almost surely, 2^138042069 is an apocalyptic number.

It is an amenable number.

138042069 is a deficient number, since it is larger than the sum of its proper divisors (64593771).

138042069 is a wasteful number, since it uses less digits than its factorization.

138042069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38500.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 138042069 is about 11749.1305635779. The cubic root of 138042069 is about 516.8174314559.

The spelling of 138042069 in words is "one hundred thirty-eight million, forty-two thousand, sixty-nine".