148678381 has 2 divisors, whose sum is σ = 148678382. Its totient is φ = 148678380.

The previous prime is 148678373. The next prime is 148678393. The reversal of 148678381 is 183876841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144817156 + 3861225 = 12034^2 + 1965^2 .

It is a cyclic number.

It is not a de Polignac number, because 148678381 - 2³ = 148678373 is a prime.

It is a super-2 number, since 2×148678381² = 44210521953562322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148678301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74339190 + 74339191.

It is an arithmetic number, because the mean of its divisors is an integer number (74339191).

Almost surely, 2^148678381 is an apocalyptic number.

It is an amenable number.

148678381 is a deficient number, since it is larger than the sum of its proper divisors (1).

148678381 is an equidigital number, since it uses as much as digits as its factorization.

148678381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 46.

The square root of 148678381 is about 12193.3744714086. The cubic root of 148678381 is about 529.7642015042.

The spelling of 148678381 in words is "one hundred forty-eight million, six hundred seventy-eight thousand, three hundred eighty-one".