153987923 has 4 divisors (see below), whose sum is σ = 157743768. Its totient is φ = 150232080.

The previous prime is 153987877. The next prime is 153987929. The reversal of 153987923 is 329789351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 153987923 - 2⁸ = 153987667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153987929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1877861 + ... + 1877942.

It is an arithmetic number, because the mean of its divisors is an integer number (39435942).

Almost surely, 2^153987923 is an apocalyptic number.

153987923 is a deficient number, since it is larger than the sum of its proper divisors (3755845).

153987923 is an equidigital number, since it uses as much as digits as its factorization.

153987923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3755844.

The product of its digits is 408240, while the sum is 47.

The square root of 153987923 is about 12409.1870402537. The cubic root of 153987923 is about 535.9968290356.

The spelling of 153987923 in words is "one hundred fifty-three million, nine hundred eighty-seven thousand, nine hundred twenty-three".