153831993 has 8 divisors (see below), whose sum is σ = 234410688. Its totient is φ = 87903984.

The previous prime is 153831971. The next prime is 153832033. The reversal of 153831993 is 399138351.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 153831993 - 2⁹ = 153831481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (153831913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662646 + ... + 3662687.

It is an arithmetic number, because the mean of its divisors is an integer number (29301336).

Almost surely, 2^153831993 is an apocalyptic number.

It is an amenable number.

153831993 is a deficient number, since it is larger than the sum of its proper divisors (80578695).

153831993 is an equidigital number, since it uses as much as digits as its factorization.

153831993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7325343.

The product of its digits is 87480, while the sum is 42.

The square root of 153831993 is about 12402.9026038263. The cubic root of 153831993 is about 535.8158490157.

The spelling of 153831993 in words is "one hundred fifty-three million, eight hundred thirty-one thousand, nine hundred ninety-three".