123848509 has 4 divisors (see below), whose sum is σ = 127195804. Its totient is φ = 120501216.

The previous prime is 123848497. The next prime is 123848521. The reversal of 123848509 is 905848321.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (123848497) and next prime (123848521).

It can be written as a sum of positive squares in 2 ways, for example, as 80946009 + 42902500 = 8997^2 + 6550^2 .

It is a cyclic number.

It is not a de Polignac number, because 123848509 - 2⁷ = 123848381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123848209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1673592 + ... + 1673665.

It is an arithmetic number, because the mean of its divisors is an integer number (31798951).

Almost surely, 2^123848509 is an apocalyptic number.

It is an amenable number.

123848509 is a deficient number, since it is larger than the sum of its proper divisors (3347295).

123848509 is an equidigital number, since it uses as much as digits as its factorization.

123848509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3347294.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 123848509 is about 11128.7245001393. The cubic root of 123848509 is about 498.4599399671.

The spelling of 123848509 in words is "one hundred twenty-three million, eight hundred forty-eight thousand, five hundred nine".