138590047 has 4 divisors (see below), whose sum is σ = 145884280. Its totient is φ = 131295816.

The previous prime is 138590041. The next prime is 138590051. The reversal of 138590047 is 740095831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740095831 = 2591 ⋅285641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138590047 is a prime.

It is a super-2 number, since 2×138590047² = 38414402254924418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138589988 and 138590015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138590041) 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, 3647088 + ... + 3647125.

It is an arithmetic number, because the mean of its divisors is an integer number (36471070).

Almost surely, 2^138590047 is an apocalyptic number.

138590047 is a deficient number, since it is larger than the sum of its proper divisors (7294233).

138590047 is an equidigital number, since it uses as much as digits as its factorization.

138590047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7294232.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 138590047 is about 11772.4274047454. The cubic root of 138590047 is about 517.5003891181.

The spelling of 138590047 in words is "one hundred thirty-eight million, five hundred ninety thousand, forty-seven".