148721423 has 8 divisors (see below), whose sum is σ = 158019840. Its totient is φ = 139968480.

The previous prime is 148721413. The next prime is 148721449. The reversal of 148721423 is 324127841.

It is a de Polignac number, because none of the positive numbers 2^k-148721423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 148721423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148721413) 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, 10223 + ... + 20048.

It is an arithmetic number, because the mean of its divisors is an integer number (19752480).

Almost surely, 2^148721423 is an apocalyptic number.

148721423 is a deficient number, since it is larger than the sum of its proper divisors (9298417).

148721423 is an frugal number, since it uses more digits than its factorization.

148721423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30322 (or 30288 counting only the distinct ones).

The product of its digits is 10752, while the sum is 32.

The square root of 148721423 is about 12195.1393185974. The cubic root of 148721423 is about 529.8153183525.

The spelling of 148721423 in words is "one hundred forty-eight million, seven hundred twenty-one thousand, four hundred twenty-three".