148879909 has 2 divisors, whose sum is σ = 148879910. Its totient is φ = 148879908.

The previous prime is 148879903. The next prime is 148879937. The reversal of 148879909 is 909978841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116424100 + 32455809 = 10790^2 + 5697^2 .

It is an emirp because it is prime and its reverse (909978841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148879909 - 2³ = 148879901 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 148879909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148879901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74439954 + 74439955.

It is an arithmetic number, because the mean of its divisors is an integer number (74439955).

Almost surely, 2^148879909 is an apocalyptic number.

It is an amenable number.

148879909 is a deficient number, since it is larger than the sum of its proper divisors (1).

148879909 is an equidigital number, since it uses as much as digits as its factorization.

148879909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 55.

The square root of 148879909 is about 12201.6355051280. The cubic root of 148879909 is about 530.0034519770.

The spelling of 148879909 in words is "one hundred forty-eight million, eight hundred seventy-nine thousand, nine hundred nine".