153858991 has 16 divisors (see below), whose sum is σ = 181107360. Its totient is φ = 128862720.

The previous prime is 153858989. The next prime is 153859049. The reversal of 153858991 is 199858351.

It is a cyclic number.

It is not a de Polignac number, because 153858991 - 2¹ = 153858989 is a prime.

It is a super-2 number, since 2×153858991² = 47345178223076162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (153858911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135715 + ... + 136843.

It is an arithmetic number, because the mean of its divisors is an integer number (11319210).

Almost surely, 2^153858991 is an apocalyptic number.

153858991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

153858991 is a deficient number, since it is larger than the sum of its proper divisors (27248369).

153858991 is a wasteful number, since it uses less digits than its factorization.

153858991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106.

The product of its digits is 388800, while the sum is 49.

The square root of 153858991 is about 12403.9909303417. The cubic root of 153858991 is about 535.8471929726.

The spelling of 153858991 in words is "one hundred fifty-three million, eight hundred fifty-eight thousand, nine hundred ninety-one".