148278857 has 2 divisors, whose sum is σ = 148278858. Its totient is φ = 148278856.

The previous prime is 148278817. The next prime is 148278863. The reversal of 148278857 is 758872841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140683321 + 7595536 = 11861^2 + 2756^2 .

It is a cyclic number.

It is not a de Polignac number, because 148278857 - 2¹⁶ = 148213321 is a prime.

It is not a weakly prime, because it can be changed into another prime (148278817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74139428 + 74139429.

It is an arithmetic number, because the mean of its divisors is an integer number (74139429).

Almost surely, 2^148278857 is an apocalyptic number.

It is an amenable number.

148278857 is a deficient number, since it is larger than the sum of its proper divisors (1).

148278857 is an equidigital number, since it uses as much as digits as its factorization.

148278857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1003520, while the sum is 50.

The square root of 148278857 is about 12176.9806191847. The cubic root of 148278857 is about 529.2892537728.

The spelling of 148278857 in words is "one hundred forty-eight million, two hundred seventy-eight thousand, eight hundred fifty-seven".