138959467 has 4 divisors (see below), whose sum is σ = 139127920. Its totient is φ = 138791016.

The previous prime is 138959449. The next prime is 138959497. The reversal of 138959467 is 764959831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138959467 - 2⁷ = 138959339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138959497) 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, 82983 + ... + 84640.

It is an arithmetic number, because the mean of its divisors is an integer number (34781980).

Almost surely, 2^138959467 is an apocalyptic number.

138959467 is a deficient number, since it is larger than the sum of its proper divisors (168453).

138959467 is an equidigital number, since it uses as much as digits as its factorization.

138959467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168452.

The product of its digits is 1632960, while the sum is 52.

The square root of 138959467 is about 11788.1070151233. The cubic root of 138959467 is about 517.9597905114.

The spelling of 138959467 in words is "one hundred thirty-eight million, nine hundred fifty-nine thousand, four hundred sixty-seven".