148856381 has 2 divisors, whose sum is σ = 148856382. Its totient is φ = 148856380.

The previous prime is 148856377. The next prime is 148856447. The reversal of 148856381 is 183658841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 62552281 = 9290^2 + 7909^2 .

It is a cyclic number.

It is not a de Polignac number, because 148856381 - 2² = 148856377 is a prime.

It is a super-2 number, since 2×148856381² = 44316444328834322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148856371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74428190 + 74428191.

It is an arithmetic number, because the mean of its divisors is an integer number (74428191).

Almost surely, 2^148856381 is an apocalyptic number.

It is an amenable number.

148856381 is a deficient number, since it is larger than the sum of its proper divisors (1).

148856381 is an equidigital number, since it uses as much as digits as its factorization.

148856381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The square root of 148856381 is about 12200.6713339881. The cubic root of 148856381 is about 529.9755310882.

The spelling of 148856381 in words is "one hundred forty-eight million, eight hundred fifty-six thousand, three hundred eighty-one".