999620036101 has 2 divisors, whose sum is σ = 999620036102. Its totient is φ = 999620036100.

The previous prime is 999620036083. The next prime is 999620036113. The reversal of 999620036101 is 101630026999.

It is a Cunningham number, because it is equal to 999810²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 999620036100 + 1 = 999810^2 + 1^2 .

It is an emirp because it is prime and its reverse (101630026999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999620036101 - 2¹³ = 999620027909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999620036201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499810018050 + 499810018051.

It is an arithmetic number, because the mean of its divisors is an integer number (499810018051).

Almost surely, 2^999620036101 is an apocalyptic number.

It is an amenable number.

999620036101 is a deficient number, since it is larger than the sum of its proper divisors (1).

999620036101 is an equidigital number, since it uses as much as digits as its factorization.

999620036101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 999620036101 in words is "nine hundred ninety-nine billion, six hundred twenty million, thirty-six thousand, one hundred one".