148681493 has 4 divisors (see below), whose sum is σ = 148714860. Its totient is φ = 148648128.

The previous prime is 148681471. The next prime is 148681513. The reversal of 148681493 is 394186841.

148681493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68525284 + 80156209 = 8278^2 + 8953^2 .

It is a cyclic number.

It is not a de Polignac number, because 148681493 - 2⁸ = 148681237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (148681433) 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, 8738 + ... + 19331.

It is an arithmetic number, because the mean of its divisors is an integer number (37178715).

Almost surely, 2^148681493 is an apocalyptic number.

It is an amenable number.

148681493 is a deficient number, since it is larger than the sum of its proper divisors (33367).

148681493 is an equidigital number, since it uses as much as digits as its factorization.

148681493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33366.

The product of its digits is 165888, while the sum is 44.

The square root of 148681493 is about 12193.5020810266. The cubic root of 148681493 is about 529.7678976585.

It can be divided in two parts, 14868 and 1493, that added together give a palindrome (16361).

The spelling of 148681493 in words is "one hundred forty-eight million, six hundred eighty-one thousand, four hundred ninety-three".