189738401 has 2 divisors, whose sum is σ = 189738402. Its totient is φ = 189738400.

The previous prime is 189738397. The next prime is 189738407. The reversal of 189738401 is 104837981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125978176 + 63760225 = 11224^2 + 7985^2 .

It is an emirp because it is prime and its reverse (104837981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189738401 - 2² = 189738397 is a prime.

It is not a weakly prime, because it can be changed into another prime (189738407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94869200 + 94869201.

It is an arithmetic number, because the mean of its divisors is an integer number (94869201).

Almost surely, 2^189738401 is an apocalyptic number.

It is an amenable number.

189738401 is a deficient number, since it is larger than the sum of its proper divisors (1).

189738401 is an equidigital number, since it uses as much as digits as its factorization.

189738401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 189738401 is about 13774.5562904944. The cubic root of 189738401 is about 574.6257436021.

The spelling of 189738401 in words is "one hundred eighty-nine million, seven hundred thirty-eight thousand, four hundred one".