123997759 has 2 divisors, whose sum is σ = 123997760. Its totient is φ = 123997758.

The previous prime is 123997751. The next prime is 123997829. The reversal of 123997759 is 957799321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123997759 - 2³ = 123997751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123997751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61998879 + 61998880.

It is an arithmetic number, because the mean of its divisors is an integer number (61998880).

Almost surely, 2^123997759 is an apocalyptic number.

123997759 is a deficient number, since it is larger than the sum of its proper divisors (1).

123997759 is an equidigital number, since it uses as much as digits as its factorization.

123997759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1071630, while the sum is 52.

The square root of 123997759 is about 11135.4281013349. The cubic root of 123997759 is about 498.6600911628.

The spelling of 123997759 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, seven hundred fifty-nine".