148821697 has 2 divisors, whose sum is σ = 148821698. Its totient is φ = 148821696.

The previous prime is 148821691. The next prime is 148821709. The reversal of 148821697 is 796128841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134351281 + 14470416 = 11591^2 + 3804^2 .

It is an emirp because it is prime and its reverse (796128841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148821697 - 2²³ = 140433089 is a prime.

It is not a weakly prime, because it can be changed into another prime (148821691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74410848 + 74410849.

It is an arithmetic number, because the mean of its divisors is an integer number (74410849).

Almost surely, 2^148821697 is an apocalyptic number.

It is an amenable number.

148821697 is a deficient number, since it is larger than the sum of its proper divisors (1).

148821697 is an equidigital number, since it uses as much as digits as its factorization.

148821697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 46.

The square root of 148821697 is about 12199.2498539869. The cubic root of 148821697 is about 529.9343659082.

The spelling of 148821697 in words is "one hundred forty-eight million, eight hundred twenty-one thousand, six hundred ninety-seven".