996855901 has 2 divisors, whose sum is σ = 996855902. Its totient is φ = 996855900.

The previous prime is 996855883. The next prime is 996855907. The reversal of 996855901 is 109558699.

996855901 = 22325² + 22326².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 498450276 + 498405625 = 22326^2 + 22325^2 .

It is a cyclic number.

It is not a de Polignac number, because 996855901 - 2¹⁵ = 996823133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (996855907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498427950 + 498427951.

It is an arithmetic number, because the mean of its divisors is an integer number (498427951).

Almost surely, 2^996855901 is an apocalyptic number.

996855901 is the 22326-th centered square number.

It is an amenable number.

996855901 is a deficient number, since it is larger than the sum of its proper divisors (1).

996855901 is an equidigital number, since it uses as much as digits as its factorization.

996855901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 52.

The square root of 996855901 is about 31573.0248946787. The cubic root of 996855901 is about 998.9508667042.

The spelling of 996855901 in words is "nine hundred ninety-six million, eight hundred fifty-five thousand, nine hundred one".