148013821 has 2 divisors, whose sum is σ = 148013822. Its totient is φ = 148013820.

The previous prime is 148013807. The next prime is 148013843. The reversal of 148013821 is 128310841.

148013821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 145805625 + 2208196 = 12075^2 + 1486^2 .

It is an emirp because it is prime and its reverse (128310841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148013821 - 2²⁷ = 13796093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148013821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148013861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74006910 + 74006911.

It is an arithmetic number, because the mean of its divisors is an integer number (74006911).

Almost surely, 2^148013821 is an apocalyptic number.

It is an amenable number.

148013821 is a deficient number, since it is larger than the sum of its proper divisors (1).

148013821 is an equidigital number, since it uses as much as digits as its factorization.

148013821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 148013821 is about 12166.0930869363. The cubic root of 148013821 is about 528.9737123382.

The spelling of 148013821 in words is "one hundred forty-eight million, thirteen thousand, eight hundred twenty-one".