148644857 has 2 divisors, whose sum is σ = 148644858. Its totient is φ = 148644856.

The previous prime is 148644817. The next prime is 148644869. The reversal of 148644857 is 758446841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104939536 + 43705321 = 10244^2 + 6611^2 .

It is a cyclic number.

It is not a de Polignac number, because 148644857 - 2²⁴ = 131867641 is a prime.

It is not a weakly prime, because it can be changed into another prime (148644817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74322428 + 74322429.

It is an arithmetic number, because the mean of its divisors is an integer number (74322429).

Almost surely, 2^148644857 is an apocalyptic number.

It is an amenable number.

148644857 is a deficient number, since it is larger than the sum of its proper divisors (1).

148644857 is an equidigital number, since it uses as much as digits as its factorization.

148644857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 860160, while the sum is 47.

The square root of 148644857 is about 12191.9997129265. Note that the first 3 decimals coincide. The cubic root of 148644857 is about 529.7243814354.

The spelling of 148644857 in words is "one hundred forty-eight million, six hundred forty-four thousand, eight hundred fifty-seven".