9139855 has 32 divisors (see below), whose sum is σ = 12441600. Its totient is φ = 6412032.

The previous prime is 9139853. The next prime is 9139861. The reversal of 9139855 is 5589319.

It is not a de Polignac number, because 9139855 - 2¹ = 9139853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9139853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102651 + ... + 102739.

It is an arithmetic number, because the mean of its divisors is an integer number (388800).

Almost surely, 2^9139855 is an apocalyptic number.

9139855 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9139855 is a deficient number, since it is larger than the sum of its proper divisors (3301745).

9139855 is a wasteful number, since it uses less digits than its factorization.

9139855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183.

The product of its digits is 48600, while the sum is 40.

The square root of 9139855 is about 3023.2193106025. The cubic root of 9139855 is about 209.0802939275.

The spelling of 9139855 in words is "nine million, one hundred thirty-nine thousand, eight hundred fifty-five".