123837649 has 8 divisors (see below), whose sum is σ = 140383040. Its totient is φ = 108295056.

The previous prime is 123837643. The next prime is 123837661. The reversal of 123837649 is 946738321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123837649 - 2⁵ = 123837617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123837643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250437 + ... + 250930.

It is an arithmetic number, because the mean of its divisors is an integer number (17547880).

Almost surely, 2^123837649 is an apocalyptic number.

123837649 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123837649 is a deficient number, since it is larger than the sum of its proper divisors (16545391).

123837649 is a wasteful number, since it uses less digits than its factorization.

123837649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501399.

The product of its digits is 217728, while the sum is 43.

The square root of 123837649 is about 11128.2365629061. The cubic root of 123837649 is about 498.4453699271.

The spelling of 123837649 in words is "one hundred twenty-three million, eight hundred thirty-seven thousand, six hundred forty-nine".