148397309 has 2 divisors, whose sum is σ = 148397310. Its totient is φ = 148397308.

The previous prime is 148397299. The next prime is 148397339. The reversal of 148397309 is 903793841.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130462084 + 17935225 = 11422^2 + 4235^2 .

It is an emirp because it is prime and its reverse (903793841) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 148397309 - 2¹² = 148393213 is a prime.

It is a super-2 number, since 2×148397309² = 44043522636882962, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 148397309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (148397339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74198654 + 74198655.

It is an arithmetic number, because the mean of its divisors is an integer number (74198655).

Almost surely, 2^148397309 is an apocalyptic number.

It is an amenable number.

148397309 is a deficient number, since it is larger than the sum of its proper divisors (1).

148397309 is an equidigital number, since it uses as much as digits as its factorization.

148397309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 148397309 is about 12181.8434155098. The cubic root of 148397309 is about 529.4301564942.

The spelling of 148397309 in words is "one hundred forty-eight million, three hundred ninety-seven thousand, three hundred nine".