189955001 has 2 divisors, whose sum is σ = 189955002. Its totient is φ = 189955000.

The previous prime is 189954997. The next prime is 189955013. The reversal of 189955001 is 100559981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167676601 + 22278400 = 12949^2 + 4720^2 .

It is a cyclic number.

It is not a de Polignac number, because 189955001 - 2² = 189954997 is a prime.

It is not a weakly prime, because it can be changed into another prime (189955081) 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, 94977500 + 94977501.

It is an arithmetic number, because the mean of its divisors is an integer number (94977501).

Almost surely, 2^189955001 is an apocalyptic number.

It is an amenable number.

189955001 is a deficient number, since it is larger than the sum of its proper divisors (1).

189955001 is an equidigital number, since it uses as much as digits as its factorization.

189955001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 189955001 is about 13782.4163701435. The cubic root of 189955001 is about 574.8443192901.

The spelling of 189955001 in words is "one hundred eighty-nine million, nine hundred fifty-five thousand, one".