147718381 has 4 divisors (see below), whose sum is σ = 147768192. Its totient is φ = 147668572.

The previous prime is 147718339. The next prime is 147718409. The reversal of 147718381 is 183817741.

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, and also an emirpimes, since its reverse is a distinct semiprime: 183817741 = 2837 ⋅64793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147718381 is a prime.

It is a super-2 number, since 2×147718381² = 43641440170522322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147718481) 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, 20155 + ... + 26488.

It is an arithmetic number, because the mean of its divisors is an integer number (36942048).

Almost surely, 2^147718381 is an apocalyptic number.

It is an amenable number.

147718381 is a deficient number, since it is larger than the sum of its proper divisors (49811).

147718381 is an equidigital number, since it uses as much as digits as its factorization.

147718381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49810.

The product of its digits is 37632, while the sum is 40.

The square root of 147718381 is about 12153.9450796850. The cubic root of 147718381 is about 528.6215288106.

The spelling of 147718381 in words is "one hundred forty-seven million, seven hundred eighteen thousand, three hundred eighty-one".