138947853 has 16 divisors (see below), whose sum is σ = 210894336. Its totient is φ = 80549040.

The previous prime is 138947849. The next prime is 138947857. The reversal of 138947853 is 358749831.

It is an interprime number because it is at equal distance from previous prime (138947849) and next prime (138947857).

It is not a de Polignac number, because 138947853 - 2² = 138947849 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138947857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90775 + ... + 92292.

It is an arithmetic number, because the mean of its divisors is an integer number (13180896).

Almost surely, 2^138947853 is an apocalyptic number.

It is an amenable number.

138947853 is a deficient number, since it is larger than the sum of its proper divisors (71946483).

138947853 is a wasteful number, since it uses less digits than its factorization.

138947853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183104.

The product of its digits is 725760, while the sum is 48.

The square root of 138947853 is about 11787.6143896889. The cubic root of 138947853 is about 517.9453600382.

The spelling of 138947853 in words is "one hundred thirty-eight million, nine hundred forty-seven thousand, eight hundred fifty-three".