138276847 has 2 divisors, whose sum is σ = 138276848. Its totient is φ = 138276846.

The previous prime is 138276821. The next prime is 138276869. The reversal of 138276847 is 748672831.

It is a strong prime.

It is an emirp because it is prime and its reverse (748672831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138276847 - 2²⁷ = 4059119 is a prime.

It is a super-2 number, since 2×138276847² = 38240972832522818, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138276797 and 138276806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138276877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69138423 + 69138424.

It is an arithmetic number, because the mean of its divisors is an integer number (69138424).

Almost surely, 2^138276847 is an apocalyptic number.

138276847 is a deficient number, since it is larger than the sum of its proper divisors (1).

138276847 is an equidigital number, since it uses as much as digits as its factorization.

138276847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 46.

The square root of 138276847 is about 11759.1176114537. The cubic root of 138276847 is about 517.1102616047.

The spelling of 138276847 in words is "one hundred thirty-eight million, two hundred seventy-six thousand, eight hundred forty-seven".