147139897 has 4 divisors (see below), whose sum is σ = 147275856. Its totient is φ = 147003940.

The previous prime is 147139871. The next prime is 147139957. The reversal of 147139897 is 798931741.

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 147139897 - 2¹¹ = 147137849 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 147139897.

It is not an unprimeable number, because it can be changed into a prime (147139807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66343 + ... + 68524.

It is an arithmetic number, because the mean of its divisors is an integer number (36818964).

Almost surely, 2^147139897 is an apocalyptic number.

It is an amenable number.

147139897 is a deficient number, since it is larger than the sum of its proper divisors (135959).

147139897 is a wasteful number, since it uses less digits than its factorization.

147139897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135958.

The product of its digits is 381024, while the sum is 49.

The square root of 147139897 is about 12130.1235360568. The cubic root of 147139897 is about 527.9305763196.

The spelling of 147139897 in words is "one hundred forty-seven million, one hundred thirty-nine thousand, eight hundred ninety-seven".