123276749 has 4 divisors (see below), whose sum is σ = 123522336. Its totient is φ = 123031164.

The previous prime is 123276721. The next prime is 123276773. The reversal of 123276749 is 947672321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123276749 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123276149) 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, 122039 + ... + 123044.

It is an arithmetic number, because the mean of its divisors is an integer number (30880584).

Almost surely, 2^123276749 is an apocalyptic number.

It is an amenable number.

123276749 is a deficient number, since it is larger than the sum of its proper divisors (245587).

123276749 is an equidigital number, since it uses as much as digits as its factorization.

123276749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245586.

The product of its digits is 127008, while the sum is 41.

The square root of 123276749 is about 11103.0063046006. The cubic root of 123276749 is about 497.6916918258.

The spelling of 123276749 in words is "one hundred twenty-three million, two hundred seventy-six thousand, seven hundred forty-nine".