148723681 has 4 divisors (see below), whose sum is σ = 155189952. Its totient is φ = 142257412.

The previous prime is 148723669. The next prime is 148723693. The reversal of 148723681 is 186327841.

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 an interprime number because it is at equal distance from previous prime (148723669) and next prime (148723693).

It is a cyclic number.

It is not a de Polignac number, because 148723681 - 2²³ = 140335073 is a prime.

It is a super-3 number, since 3×148723681³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 not an unprimeable number, because it can be changed into a prime (148723661) 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, 3233101 + ... + 3233146.

It is an arithmetic number, because the mean of its divisors is an integer number (38797488).

Almost surely, 2^148723681 is an apocalyptic number.

It is an amenable number.

148723681 is a deficient number, since it is larger than the sum of its proper divisors (6466271).

148723681 is an equidigital number, since it uses as much as digits as its factorization.

148723681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466270.

The product of its digits is 64512, while the sum is 40.

The square root of 148723681 is about 12195.2318961142. The cubic root of 148723681 is about 529.8179996899.

The spelling of 148723681 in words is "one hundred forty-eight million, seven hundred twenty-three thousand, six hundred eighty-one".