994581651197 has 2 divisors, whose sum is σ = 994581651198. Its totient is φ = 994581651196.

The previous prime is 994581651191. The next prime is 994581651223. The reversal of 994581651197 is 791156185499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 856598376676 + 137983274521 = 925526^2 + 371461^2 .

It is a cyclic number.

It is not a de Polignac number, because 994581651197 - 2¹⁶ = 994581585661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (994581651191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497290825598 + 497290825599.

It is an arithmetic number, because the mean of its divisors is an integer number (497290825599).

Almost surely, 2^994581651197 is an apocalyptic number.

It is an amenable number.

994581651197 is a deficient number, since it is larger than the sum of its proper divisors (1).

994581651197 is an equidigital number, since it uses as much as digits as its factorization.

994581651197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24494400, while the sum is 65.

The spelling of 994581651197 in words is "nine hundred ninety-four billion, five hundred eighty-one million, six hundred fifty-one thousand, one hundred ninety-seven".