123776489 has 16 divisors (see below), whose sum is σ = 130099200. Its totient is φ = 117660816.

The previous prime is 123776467. The next prime is 123776509. The reversal of 123776489 is 984677321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123776489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123772489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281732 + ... + 282170.

It is an arithmetic number, because the mean of its divisors is an integer number (8131200).

Almost surely, 2^123776489 is an apocalyptic number.

It is an amenable number.

123776489 is a deficient number, since it is larger than the sum of its proper divisors (6322711).

123776489 is an equidigital number, since it uses as much as digits as its factorization.

123776489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644.

The product of its digits is 508032, while the sum is 47.

The square root of 123776489 is about 11125.4882589485. The cubic root of 123776489 is about 498.3633002738.

The spelling of 123776489 in words is "one hundred twenty-three million, seven hundred seventy-six thousand, four hundred eighty-nine".