123829649 has 8 divisors (see below), whose sum is σ = 131217480. Its totient is φ = 116453376.

The previous prime is 123829627. The next prime is 123829663. The reversal of 123829649 is 946928321.

It can be written as a sum of positive squares in 4 ways, for example, as 14250625 + 109579024 = 3775^2 + 10468^2 .

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 123829649 - 2¹² = 123825553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123829619) 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, 29897 + ... + 33785.

It is an arithmetic number, because the mean of its divisors is an integer number (16402185).

Almost surely, 2^123829649 is an apocalyptic number.

It is an amenable number.

123829649 is a deficient number, since it is larger than the sum of its proper divisors (7387831).

123829649 is a wasteful number, since it uses less digits than its factorization.

123829649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779.

The product of its digits is 186624, while the sum is 44.

The square root of 123829649 is about 11127.8771111115. The cubic root of 123829649 is about 498.4346363878.

The spelling of 123829649 in words is "one hundred twenty-three million, eight hundred twenty-nine thousand, six hundred forty-nine".