123497819 has 2 divisors, whose sum is σ = 123497820. Its totient is φ = 123497818.

The previous prime is 123497779. The next prime is 123497827. The reversal of 123497819 is 918794321.

It is a strong prime.

It is an emirp because it is prime and its reverse (918794321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123497819 - 2¹² = 123493723 is a prime.

It is a super-2 number, since 2×123497819² = 30503422595513522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123497819.

It is not a weakly prime, because it can be changed into another prime (123497839) 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, 61748909 + 61748910.

It is an arithmetic number, because the mean of its divisors is an integer number (61748910).

Almost surely, 2^123497819 is an apocalyptic number.

123497819 is a deficient number, since it is larger than the sum of its proper divisors (1).

123497819 is an equidigital number, since it uses as much as digits as its factorization.

123497819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 44.

The square root of 123497819 is about 11112.9572571841. The cubic root of 123497819 is about 497.9890147198.

The spelling of 123497819 in words is "one hundred twenty-three million, four hundred ninety-seven thousand, eight hundred nineteen".