138900007 has 2 divisors, whose sum is σ = 138900008. Its totient is φ = 138900006.

The previous prime is 138899963. The next prime is 138900029. The reversal of 138900007 is 700009831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 138900007 - 2¹¹ = 138897959 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138900037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69450003 + 69450004.

It is an arithmetic number, because the mean of its divisors is an integer number (69450004).

Almost surely, 2^138900007 is an apocalyptic number.

138900007 is a deficient number, since it is larger than the sum of its proper divisors (1).

138900007 is an equidigital number, since it uses as much as digits as its factorization.

138900007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 138900007 is about 11785.5847118418. The cubic root of 138900007 is about 517.8859025794.

Adding to 138900007 its reverse (700009831), we get a palindrome (838909838).

The spelling of 138900007 in words is "one hundred thirty-eight million, nine hundred thousand, seven".