123272749 has 2 divisors, whose sum is σ = 123272750. Its totient is φ = 123272748.

The previous prime is 123272719. The next prime is 123272759. The reversal of 123272749 is 947272321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115885225 + 7387524 = 10765^2 + 2718^2 .

It is a cyclic number.

It is not a de Polignac number, because 123272749 - 2¹⁷ = 123141677 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123272719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61636374 + 61636375.

It is an arithmetic number, because the mean of its divisors is an integer number (61636375).

Almost surely, 2^123272749 is an apocalyptic number.

It is an amenable number.

123272749 is a deficient number, since it is larger than the sum of its proper divisors (1).

123272749 is an equidigital number, since it uses as much as digits as its factorization.

123272749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 123272749 is about 11102.8261717456. The cubic root of 123272749 is about 497.6863088473.

The spelling of 123272749 in words is "one hundred twenty-three million, two hundred seventy-two thousand, seven hundred forty-nine".