153638939 has 4 divisors (see below), whose sum is σ = 155743656. Its totient is φ = 151534224.

The previous prime is 153638929. The next prime is 153638951. The reversal of 153638939 is 939836351.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939836351 = 89 ⋅10559959.

It is a cyclic number.

It is not a de Polignac number, because 153638939 - 2¹⁶ = 153573403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 153638893 and 153638902.

It is not an unprimeable number, because it can be changed into a prime (153638929) 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 3 ways as a sum of consecutive naturals, for example, 1052249 + ... + 1052394.

It is an arithmetic number, because the mean of its divisors is an integer number (38935914).

Almost surely, 2^153638939 is an apocalyptic number.

153638939 is a deficient number, since it is larger than the sum of its proper divisors (2104717).

153638939 is an equidigital number, since it uses as much as digits as its factorization.

153638939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104716.

The product of its digits is 524880, while the sum is 47.

The square root of 153638939 is about 12395.1175468408. The cubic root of 153638939 is about 535.5916115366.

The spelling of 153638939 in words is "one hundred fifty-three million, six hundred thirty-eight thousand, nine hundred thirty-nine".