999998074746491 has 2 divisors, whose sum is σ = 999998074746492. Its totient is φ = 999998074746490.

The previous prime is 999998074746421. The next prime is 999998074746521. The reversal of 999998074746491 is 194647470899999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998074746491 - 2¹⁴ = 999998074730107 is a prime.

It is a super-2 number, since 2×999998074746491² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 999998074746394 and 999998074746403.

It is not a weakly prime, because it can be changed into another prime (999998074746421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999037373245 + 499999037373246.

It is an arithmetic number, because the mean of its divisors is an integer number (499999037373246).

Almost surely, 2^{999998074746491} is an apocalyptic number.

999998074746491 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998074746491 is an equidigital number, since it uses as much as digits as its factorization.

999998074746491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79996750848, while the sum is 95.

The spelling of 999998074746491 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, seventy-four million, seven hundred forty-six thousand, four hundred ninety-one".