147289993 has 4 divisors (see below), whose sum is σ = 147331600. Its totient is φ = 147248388.

The previous prime is 147289991. The next prime is 147290009. The reversal of 147289993 is 399982741.

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.

It is a cyclic number.

It is not a de Polignac number, because 147289993 - 2¹ = 147289991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 147289993.

It is not an unprimeable number, because it can be changed into a prime (147289991) 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, 14943 + ... + 22756.

It is an arithmetic number, because the mean of its divisors is an integer number (36832900).

Almost surely, 2^147289993 is an apocalyptic number.

It is an amenable number.

147289993 is a deficient number, since it is larger than the sum of its proper divisors (41607).

147289993 is an equidigital number, since it uses as much as digits as its factorization.

147289993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41606.

The product of its digits is 979776, while the sum is 52.

The square root of 147289993 is about 12136.3088704927. The cubic root of 147289993 is about 528.1100276231.

The spelling of 147289993 in words is "one hundred forty-seven million, two hundred eighty-nine thousand, nine hundred ninety-three".