123772069 has 2 divisors, whose sum is σ = 123772070. Its totient is φ = 123772068.

The previous prime is 123772021. The next prime is 123772073. The reversal of 123772069 is 960277321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122367844 + 1404225 = 11062^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 123772069 - 2¹⁹ = 123247781 is a prime.

It is a super-2 number, since 2×123772069² = 30639050129081522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123772079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61886034 + 61886035.

It is an arithmetic number, because the mean of its divisors is an integer number (61886035).

Almost surely, 2^123772069 is an apocalyptic number.

It is an amenable number.

123772069 is a deficient number, since it is larger than the sum of its proper divisors (1).

123772069 is an equidigital number, since it uses as much as digits as its factorization.

123772069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 123772069 is about 11125.2896142078. The cubic root of 123772069 is about 498.3573680971.

The spelling of 123772069 in words is "one hundred twenty-three million, seven hundred seventy-two thousand, sixty-nine".