138432695 has 8 divisors (see below), whose sum is σ = 169982736. Its totient is φ = 108170496.

The previous prime is 138432691. The next prime is 138432743. The reversal of 138432695 is 596234831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138432695 - 2² = 138432691 is a prime.

It is a super-2 number, since 2×138432695² = 38327222089926050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138432691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321722 + ... + 322151.

It is an arithmetic number, because the mean of its divisors is an integer number (21247842).

Almost surely, 2^138432695 is an apocalyptic number.

138432695 is a deficient number, since it is larger than the sum of its proper divisors (31550041).

138432695 is an equidigital number, since it uses as much as digits as its factorization.

138432695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643921.

The product of its digits is 155520, while the sum is 41.

The square root of 138432695 is about 11765.7424330129. The cubic root of 138432695 is about 517.3044622093.

The spelling of 138432695 in words is "one hundred thirty-eight million, four hundred thirty-two thousand, six hundred ninety-five".