152993209 has 4 divisors (see below), whose sum is σ = 153909504. Its totient is φ = 152076916.

The previous prime is 152993207. The next prime is 152993219. The reversal of 152993209 is 902399251.

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: 902399251 = 13 ⋅69415327.

It is a cyclic number.

It is not a de Polignac number, because 152993209 - 2¹ = 152993207 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (152993207) 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 3 ways as a sum of consecutive naturals, for example, 457897 + ... + 458230.

It is an arithmetic number, because the mean of its divisors is an integer number (38477376).

Almost surely, 2^152993209 is an apocalyptic number.

It is an amenable number.

152993209 is a deficient number, since it is larger than the sum of its proper divisors (916295).

152993209 is an equidigital number, since it uses as much as digits as its factorization.

152993209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916294.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 152993209 is about 12369.0423639019. The cubic root of 152993209 is about 534.8402108182.

The spelling of 152993209 in words is "one hundred fifty-two million, nine hundred ninety-three thousand, two hundred nine".