153032993 has 4 divisors (see below), whose sum is σ = 154876848. Its totient is φ = 151189140.

The previous prime is 153032959. The next prime is 153033017. The reversal of 153032993 is 399230351.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 399230351 = 13 ⋅30710027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-153032993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (153032953) 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, 921803 + ... + 921968.

It is an arithmetic number, because the mean of its divisors is an integer number (38719212).

Almost surely, 2^153032993 is an apocalyptic number.

It is an amenable number.

153032993 is a deficient number, since it is larger than the sum of its proper divisors (1843855).

153032993 is an equidigital number, since it uses as much as digits as its factorization.

153032993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1843854.

The product of its (nonzero) digits is 21870, while the sum is 35.

The square root of 153032993 is about 12370.6504679423. The cubic root of 153032993 is about 534.8865663372.

The spelling of 153032993 in words is "one hundred fifty-three million, thirty-two thousand, nine hundred ninety-three".