995221001 has 2 divisors, whose sum is σ = 995221002. Its totient is φ = 995221000.

The previous prime is 995220991. The next prime is 995221013. The reversal of 995221001 is 100122599.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 613057600 + 382163401 = 24760^2 + 19549^2 .

It is an emirp because it is prime and its reverse (100122599) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 995221001 - 2⁶ = 995220937 is a prime.

It is not a weakly prime, because it can be changed into another prime (995221061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497610500 + 497610501.

It is an arithmetic number, because the mean of its divisors is an integer number (497610501).

Almost surely, 2^995221001 is an apocalyptic number.

It is an amenable number.

995221001 is a deficient number, since it is larger than the sum of its proper divisors (1).

995221001 is an equidigital number, since it uses as much as digits as its factorization.

995221001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 995221001 is about 31547.1234980307. The cubic root of 995221001 is about 998.4044559264.

The spelling of 995221001 in words is "nine hundred ninety-five million, two hundred twenty-one thousand, one".