148962809 has 2 divisors, whose sum is σ = 148962810. Its totient is φ = 148962808.

The previous prime is 148962791. The next prime is 148962833. The reversal of 148962809 is 908269841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148962025 + 784 = 12205^2 + 28^2 .

It is an emirp because it is prime and its reverse (908269841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148962809 - 2¹² = 148958713 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (148962889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74481404 + 74481405.

It is an arithmetic number, because the mean of its divisors is an integer number (74481405).

Almost surely, 2^148962809 is an apocalyptic number.

It is an amenable number.

148962809 is a deficient number, since it is larger than the sum of its proper divisors (1).

148962809 is an equidigital number, since it uses as much as digits as its factorization.

148962809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 148962809 is about 12205.0321179422. The cubic root of 148962809 is about 530.1018067156.

The spelling of 148962809 in words is "one hundred forty-eight million, nine hundred sixty-two thousand, eight hundred nine".