147481981 has 8 divisors (see below), whose sum is σ = 150436224. Its totient is φ = 144552240.

The previous prime is 147481979. The next prime is 147481991. The reversal of 147481981 is 189184741.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 147481981 - 2¹ = 147481979 is a prime.

It is a super-2 number, since 2×147481981² = 43501869439368722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147481931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6280 + ... + 18286.

It is an arithmetic number, because the mean of its divisors is an integer number (18804528).

Almost surely, 2^147481981 is an apocalyptic number.

It is an amenable number.

147481981 is a deficient number, since it is larger than the sum of its proper divisors (2954243).

147481981 is a wasteful number, since it uses less digits than its factorization.

147481981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12251.

The product of its digits is 64512, while the sum is 43.

The square root of 147481981 is about 12144.2159483435. The cubic root of 147481981 is about 528.3393864196.

The spelling of 147481981 in words is "one hundred forty-seven million, four hundred eighty-one thousand, nine hundred eighty-one".