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148913209 = 122032
BaseRepresentation
bin10001110000000…
…11110000111001
3101101012120112001
420320003300321
5301110210314
622435421001
73455512204
oct1070036071
9341176461
10148913209
117706a775
1241a54761
1324b0b333
1415ac493b
15d117674
hex8e03c39

148913209 has 3 divisors (see below), whose sum is σ = 148925413. Its totient is φ = 148901006.

The previous prime is 148913207. The next prime is 148913263. The reversal of 148913209 is 902319841.

The square root of 148913209 is 12203.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 148913209 - 21 = 148913207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (148913207) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6102 + ... + 18304.

Almost surely, 2148913209 is an apocalyptic number.

148913209 is the 12203-rd square number.

148913209 is the 6102-nd centered octagonal number.

It is an amenable number.

148913209 is a deficient number, since it is larger than the sum of its proper divisors (12204).

148913209 is an frugal number, since it uses more digits than its factorization.

148913209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24406 (or 12203 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The cubic root of 148913209 is about 530.0429643585.

The spelling of 148913209 in words is "one hundred forty-eight million, nine hundred thirteen thousand, two hundred nine".

Divisors: 1 12203 148913209