147013981 has 4 divisors (see below), whose sum is σ = 147458464. Its totient is φ = 146569500.

The previous prime is 147013969. The next prime is 147014003. The reversal of 147013981 is 189310741.

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 147013981 - 2¹⁷ = 146882909 is a prime.

It is a super-2 number, since 2×147013981² = 43226221218936722, 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 (147013921) 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, 221745 + ... + 222406.

It is an arithmetic number, because the mean of its divisors is an integer number (36864616).

Almost surely, 2^147013981 is an apocalyptic number.

It is an amenable number.

147013981 is a deficient number, since it is larger than the sum of its proper divisors (444483).

147013981 is an equidigital number, since it uses as much as digits as its factorization.

147013981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444482.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 147013981 is about 12124.9322059960. The cubic root of 147013981 is about 527.7799399095.

It can be divided in two parts, 1470 and 13981, that added together give a palindrome (15451).

The spelling of 147013981 in words is "one hundred forty-seven million, thirteen thousand, nine hundred eighty-one".