147730993 has 4 divisors (see below), whose sum is σ = 147763008. Its totient is φ = 147698980.

The previous prime is 147730991. The next prime is 147731009. The reversal of 147730993 is 399037741.

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.

It is a cyclic number.

It is not a de Polignac number, because 147730993 - 2¹ = 147730991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (147730991) 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, 7621 + ... + 18802.

It is an arithmetic number, because the mean of its divisors is an integer number (36940752).

Almost surely, 2^147730993 is an apocalyptic number.

It is an amenable number.

147730993 is a deficient number, since it is larger than the sum of its proper divisors (32015).

147730993 is an equidigital number, since it uses as much as digits as its factorization.

147730993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32014.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 147730993 is about 12154.4639124891. The cubic root of 147730993 is about 528.6365727181.

The spelling of 147730993 in words is "one hundred forty-seven million, seven hundred thirty thousand, nine hundred ninety-three".