147981 has 8 divisors (see below), whose sum is σ = 199584. Its totient is φ = 97520.

The previous prime is 147977. The next prime is 147997. The reversal of 147981 is 189741.

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 147981 - 2² = 147977 is a prime.

It is a super-2 number, since 2×147981² = 43796752722, which contains 22 as substring.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 147981.

It is not an unprimeable number, because it can be changed into a prime (147481) 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, 91 + ... + 551.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2¹⁴⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

147981 is a deficient number, since it is larger than the sum of its proper divisors (51603).

147981 is a wasteful number, since it uses less digits than its factorization.

147981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571.

The product of its digits is 2016, while the sum is 30.

The square root of 147981 is about 384.6829863667. The cubic root of 147981 is about 52.8934610743.

It can be divided in two parts, 147 and 981, that added together give a triangular number (1128 = T₄₇).

The spelling of 147981 in words is "one hundred forty-seven thousand, nine hundred eighty-one".