999423737867 has 2 divisors, whose sum is σ = 999423737868. Its totient is φ = 999423737866.

The previous prime is 999423737857. The next prime is 999423737891. The reversal of 999423737867 is 768737324999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999423737867 - 2³⁰ = 998349996043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999423737794 and 999423737803.

It is not a weakly prime, because it can be changed into another prime (999423737857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499711868933 + 499711868934.

It is an arithmetic number, because the mean of its divisors is an integer number (499711868934).

Almost surely, 2^999423737867 is an apocalyptic number.

999423737867 is a deficient number, since it is larger than the sum of its proper divisors (1).

999423737867 is an equidigital number, since it uses as much as digits as its factorization.

999423737867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864162432, while the sum is 74.

The spelling of 999423737867 in words is "nine hundred ninety-nine billion, four hundred twenty-three million, seven hundred thirty-seven thousand, eight hundred sixty-seven".