200902001 has 2 divisors, whose sum is σ = 200902002. Its totient is φ = 200902000.

The previous prime is 200901989. The next prime is 200902003. The reversal of 200902001 is 100209002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179962225 + 20939776 = 13415^2 + 4576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200902001 is a prime.

It is a super-2 number, since 2×200902001² = 80723228011608002, which contains 22 as substring.

Together with 200902003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (200902003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100451000 + 100451001.

It is an arithmetic number, because the mean of its divisors is an integer number (100451001).

Almost surely, 2^200902001 is an apocalyptic number.

It is an amenable number.

200902001 is a deficient number, since it is larger than the sum of its proper divisors (1).

200902001 is an equidigital number, since it uses as much as digits as its factorization.

200902001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 200902001 is about 14173.9902991359. The cubic root of 200902001 is about 585.6813849200.

The spelling of 200902001 in words is "two hundred million, nine hundred two thousand, one".