999998074746637 has 2 divisors, whose sum is σ = 999998074746638. Its totient is φ = 999998074746636.

The previous prime is 999998074746551. The next prime is 999998074746641. The reversal of 999998074746637 is 736647470899999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 901498583301156 + 98499491445481 = 30024966^2 + 9924691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999998074746637 is a prime.

It is a super-2 number, since 2×999998074746637² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998074746667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999037373318 + 499999037373319.

It is an arithmetic number, because the mean of its divisors is an integer number (499999037373319).

Almost surely, 2^{999998074746637} is an apocalyptic number.

It is an amenable number.

999998074746637 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998074746637 is an equidigital number, since it uses as much as digits as its factorization.

999998074746637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279988627968, while the sum is 97.

The spelling of 999998074746637 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, seventy-four million, seven hundred forty-six thousand, six hundred thirty-seven".