148636181 has 4 divisors (see below), whose sum is σ = 148975200. Its totient is φ = 148297164.

The previous prime is 148636129. The next prime is 148636211. The reversal of 148636181 is 181636841.

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 a de Polignac number, because none of the positive numbers 2^k-148636181 is a prime.

It is a super-2 number, since 2×148636181² = 44185428604529522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148636121) 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, 168851 + ... + 169728.

It is an arithmetic number, because the mean of its divisors is an integer number (37243800).

Almost surely, 2^148636181 is an apocalyptic number.

It is an amenable number.

148636181 is a deficient number, since it is larger than the sum of its proper divisors (339019).

148636181 is an equidigital number, since it uses as much as digits as its factorization.

148636181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339018.

The product of its digits is 27648, while the sum is 38.

The square root of 148636181 is about 12191.6439006395. The cubic root of 148636181 is about 529.7140750397.

The spelling of 148636181 in words is "one hundred forty-eight million, six hundred thirty-six thousand, one hundred eighty-one".