138527929 has 4 divisors (see below), whose sum is σ = 140875920. Its totient is φ = 136179940.

The previous prime is 138527923. The next prime is 138527953. The reversal of 138527929 is 929725831.

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 138527929 - 2⁷ = 138527801 is a prime.

It is a super-2 number, since 2×138527929² = 38379974226058082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138527923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1173907 + ... + 1174024.

It is an arithmetic number, because the mean of its divisors is an integer number (35218980).

Almost surely, 2^138527929 is an apocalyptic number.

It is an amenable number.

138527929 is a deficient number, since it is larger than the sum of its proper divisors (2347991).

138527929 is an equidigital number, since it uses as much as digits as its factorization.

138527929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347990.

The product of its digits is 272160, while the sum is 46.

The square root of 138527929 is about 11769.7888256332. The cubic root of 138527929 is about 517.4230605897.

The spelling of 138527929 in words is "one hundred thirty-eight million, five hundred twenty-seven thousand, nine hundred twenty-nine".