138951485 has 12 divisors (see below), whose sum is σ = 169300308. Its totient is φ = 109460736.

The previous prime is 138951481. The next prime is 138951509. The reversal of 138951485 is 584159831.

It can be written as a sum of positive squares in 6 ways, for example, as 51079609 + 87871876 = 7147^2 + 9374^2 .

It is not a de Polignac number, because 138951485 - 2² = 138951481 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 (138951481) 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 in 11 ways as a sum of consecutive naturals, for example, 224897 + ... + 225513.

It is an arithmetic number, because the mean of its divisors is an integer number (14108359).

Almost surely, 2^138951485 is an apocalyptic number.

It is an amenable number.

138951485 is a deficient number, since it is larger than the sum of its proper divisors (30348823).

138951485 is an frugal number, since it uses more digits than its factorization.

138951485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1312 (or 695 counting only the distinct ones).

The product of its digits is 172800, while the sum is 44.

The square root of 138951485 is about 11787.7684486929. The cubic root of 138951485 is about 517.9498729091.

The spelling of 138951485 in words is "one hundred thirty-eight million, nine hundred fifty-one thousand, four hundred eighty-five".