191602001 has 2 divisors, whose sum is σ = 191602002. Its totient is φ = 191602000.

The previous prime is 191601997. The next prime is 191602007. The reversal of 191602001 is 100206191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178089025 + 13512976 = 13345^2 + 3676^2 .

It is an emirp because it is prime and its reverse (100206191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191602001 - 2² = 191601997 is a prime.

It is a super-2 number, since 2×191602001² = 73422653574408002, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (191602007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95801000 + 95801001.

It is an arithmetic number, because the mean of its divisors is an integer number (95801001).

Almost surely, 2^191602001 is an apocalyptic number.

It is an amenable number.

191602001 is a deficient number, since it is larger than the sum of its proper divisors (1).

191602001 is an equidigital number, since it uses as much as digits as its factorization.

191602001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 191602001 is about 13842.0374584091. The cubic root of 191602001 is about 576.5009316155.

Adding to 191602001 its reverse (100206191), we get a palindrome (291808192).

The spelling of 191602001 in words is "one hundred ninety-one million, six hundred two thousand, one".