138354087 has 4 divisors (see below), whose sum is σ = 184472120. Its totient is φ = 92236056.

The previous prime is 138354071. The next prime is 138354089. The reversal of 138354087 is 780453831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780453831 = 3 ⋅260151277.

It is not a de Polignac number, because 138354087 - 2⁴ = 138354071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138354089) 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, 23059012 + ... + 23059017.

It is an arithmetic number, because the mean of its divisors is an integer number (46118030).

Almost surely, 2^138354087 is an apocalyptic number.

138354087 is a deficient number, since it is larger than the sum of its proper divisors (46118033).

138354087 is an equidigital number, since it uses as much as digits as its factorization.

138354087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46118032.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 138354087 is about 11762.4014129769. The cubic root of 138354087 is about 517.2065278098.

The spelling of 138354087 in words is "one hundred thirty-eight million, three hundred fifty-four thousand, eighty-seven".