148915817 has 2 divisors, whose sum is σ = 148915818. Its totient is φ = 148915816.

The previous prime is 148915729. The next prime is 148915853. The reversal of 148915817 is 718519841.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135047641 + 13868176 = 11621^2 + 3724^2 .

It is a cyclic number.

It is not a de Polignac number, because 148915817 - 2⁸ = 148915561 is a prime.

It is not a weakly prime, because it can be changed into another prime (148915717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74457908 + 74457909.

It is an arithmetic number, because the mean of its divisors is an integer number (74457909).

Almost surely, 2^148915817 is an apocalyptic number.

It is an amenable number.

148915817 is a deficient number, since it is larger than the sum of its proper divisors (1).

148915817 is an equidigital number, since it uses as much as digits as its factorization.

148915817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 44.

The square root of 148915817 is about 12203.1068585012. The cubic root of 148915817 is about 530.0460586530.

The spelling of 148915817 in words is "one hundred forty-eight million, nine hundred fifteen thousand, eight hundred seventeen".