147856989 has 16 divisors (see below), whose sum is σ = 225520128. Its totient is φ = 84409392.

The previous prime is 147856979. The next prime is 147857053. The reversal of 147856989 is 989658741.

It is not a de Polignac number, because 147856989 - 2⁸ = 147856733 is a prime.

It is a super-2 number, since 2×147856989² = 43723378392292242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147856979) 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 15 ways as a sum of consecutive naturals, for example, 24754 + ... + 30140.

It is an arithmetic number, because the mean of its divisors is an integer number (14095008).

Almost surely, 2^147856989 is an apocalyptic number.

It is an amenable number.

147856989 is a deficient number, since it is larger than the sum of its proper divisors (77663139).

147856989 is a wasteful number, since it uses less digits than its factorization.

147856989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704.

The product of its digits is 4354560, while the sum is 57.

The square root of 147856989 is about 12159.6459241213. The cubic root of 147856989 is about 528.7868169011.

The spelling of 147856989 in words is "one hundred forty-seven million, eight hundred fifty-six thousand, nine hundred eighty-nine".