189391801 has 2 divisors, whose sum is σ = 189391802. Its totient is φ = 189391800.

The previous prime is 189391793. The next prime is 189391841. The reversal of 189391801 is 108193981.

It is a happy number.

It is an a-pointer prime, because the next prime (189391841) can be obtained adding 189391801 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 118831801 + 70560000 = 10901^2 + 8400^2 .

It is a cyclic number.

It is not a de Polignac number, because 189391801 - 2³ = 189391793 is a prime.

It is not a weakly prime, because it can be changed into another prime (189391841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94695900 + 94695901.

It is an arithmetic number, because the mean of its divisors is an integer number (94695901).

Almost surely, 2^189391801 is an apocalyptic number.

It is an amenable number.

189391801 is a deficient number, since it is larger than the sum of its proper divisors (1).

189391801 is an equidigital number, since it uses as much as digits as its factorization.

189391801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 40.

The square root of 189391801 is about 13761.9693721502. The cubic root of 189391801 is about 574.2756358075.

The spelling of 189391801 in words is "one hundred eighty-nine million, three hundred ninety-one thousand, eight hundred one".