123997797 has 84 divisors (see below), whose sum is σ = 236822496. Its totient is φ = 63043920.

The previous prime is 123997759. The next prime is 123997829. The reversal of 123997797 is 797799321.

It is a happy number.

It is not a de Polignac number, because 123997797 - 2⁶ = 123997733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123997717) 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 in 83 ways as a sum of consecutive naturals, for example, 2638228 + ... + 2638274.

Almost surely, 2^123997797 is an apocalyptic number.

It is an amenable number.

123997797 is a deficient number, since it is larger than the sum of its proper divisors (112824699).

123997797 is an frugal number, since it uses more digits than its factorization.

123997797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 68 counting only the distinct ones).

The product of its digits is 1500282, while the sum is 54.

The square root of 123997797 is about 11135.4298076006. The cubic root of 123997797 is about 498.6601421021.

The spelling of 123997797 in words is "one hundred twenty-three million, nine hundred ninety-seven thousand, seven hundred ninety-seven".