148864381 has 2 divisors, whose sum is σ = 148864382. Its totient is φ = 148864380.

The previous prime is 148864367. The next prime is 148864403. The reversal of 148864381 is 183468841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140067225 + 8797156 = 11835^2 + 2966^2 .

It is an emirp because it is prime and its reverse (183468841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148864381 - 2¹¹ = 148862333 is a prime.

It is a super-2 number, since 2×148864381² = 44321207861026322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148864321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74432190 + 74432191.

It is an arithmetic number, because the mean of its divisors is an integer number (74432191).

Almost surely, 2^148864381 is an apocalyptic number.

It is an amenable number.

148864381 is a deficient number, since it is larger than the sum of its proper divisors (1).

148864381 is an equidigital number, since it uses as much as digits as its factorization.

148864381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 43.

The square root of 148864381 is about 12200.9991803950. Note that the first 3 decimals coincide. The cubic root of 148864381 is about 529.9850250901.

The spelling of 148864381 in words is "one hundred forty-eight million, eight hundred sixty-four thousand, three hundred eighty-one".