153913985 has 8 divisors (see below), whose sum is σ = 188992320. Its totient is φ = 120267504.

The previous prime is 153913957. The next prime is 153913987. The reversal of 153913985 is 589319351.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153913985 is a prime.

It is not an unprimeable number, because it can be changed into a prime (153913987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357725 + ... + 358154.

It is an arithmetic number, because the mean of its divisors is an integer number (23624040).

Almost surely, 2^153913985 is an apocalyptic number.

It is an amenable number.

153913985 is a deficient number, since it is larger than the sum of its proper divisors (35078335).

153913985 is an equidigital number, since it uses as much as digits as its factorization.

153913985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715927.

The product of its digits is 145800, while the sum is 44.

The square root of 153913985 is about 12406.2075188190. The cubic root of 153913985 is about 535.9110281983.

The spelling of 153913985 in words is "one hundred fifty-three million, nine hundred thirteen thousand, nine hundred eighty-five".