138862207 has 4 divisors (see below), whose sum is σ = 151486056. Its totient is φ = 126238360.

The previous prime is 138862183. The next prime is 138862211. The reversal of 138862207 is 702268831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702268831 = 11 ⋅63842621.

It is a cyclic number.

It is not a de Polignac number, because 138862207 - 2⁷ = 138862079 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 (138862907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6311908 + ... + 6311929.

It is an arithmetic number, because the mean of its divisors is an integer number (37871514).

Almost surely, 2^138862207 is an apocalyptic number.

138862207 is a deficient number, since it is larger than the sum of its proper divisors (12623849).

138862207 is a wasteful number, since it uses less digits than its factorization.

138862207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12623848.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 138862207 is about 11783.9809487287. The cubic root of 138862207 is about 517.8389194688.

The spelling of 138862207 in words is "one hundred thirty-eight million, eight hundred sixty-two thousand, two hundred seven".