9992001601 has 2 divisors, whose sum is σ = 9992001602. Its totient is φ = 9992001600.

The previous prime is 9992001577. The next prime is 9992001631. The reversal of 9992001601 is 1061002999.

It is a Cunningham number, because it is equal to 99960²+1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9992001600 + 1 = 99960^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 9992001601 - 2³¹ = 7844517953 is a prime.

It is not a weakly prime, because it can be changed into another prime (9992001631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4996000800 + 4996000801.

It is an arithmetic number, because the mean of its divisors is an integer number (4996000801).

Almost surely, 2^9992001601 is an apocalyptic number.

It is an amenable number.

9992001601 is a deficient number, since it is larger than the sum of its proper divisors (1).

9992001601 is an equidigital number, since it uses as much as digits as its factorization.

9992001601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 37.

The square root of 9992001601 is about 99960.0000050020. Note that the first 5 decimals coincide. The cubic root of 9992001601 is about 2153.8601358785.

The spelling of 9992001601 in words is "nine billion, nine hundred ninety-two million, one thousand, six hundred one".