138958485 has 16 divisors (see below), whose sum is σ = 222771264. Its totient is φ = 73965312.

The previous prime is 138958451. The next prime is 138958487. The reversal of 138958485 is 584859831.

It is not a de Polignac number, because 138958485 - 2¹⁰ = 138957461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138958487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1012 + ... + 16701.

It is an arithmetic number, because the mean of its divisors is an integer number (13923204).

Almost surely, 2^138958485 is an apocalyptic number.

138958485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138958485 is a deficient number, since it is larger than the sum of its proper divisors (83812779).

138958485 is a wasteful number, since it uses less digits than its factorization.

138958485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18244.

The product of its digits is 1382400, while the sum is 51.

The square root of 138958485 is about 11788.0653628999. The cubic root of 138958485 is about 517.9585704009.

The spelling of 138958485 in words is "one hundred thirty-eight million, nine hundred fifty-eight thousand, four hundred eighty-five".