189110530381 has 2 divisors, whose sum is σ = 189110530382. Its totient is φ = 189110530380.

The previous prime is 189110530351. The next prime is 189110530487. The reversal of 189110530381 is 183035011981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161772884100 + 27337646281 = 402210^2 + 165341^2 .

It is an emirp because it is prime and its reverse (183035011981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189110530381 - 2⁷ = 189110530253 is a prime.

It is a super-2 number, since 2×189110530381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189110530351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94555265190 + 94555265191.

It is an arithmetic number, because the mean of its divisors is an integer number (94555265191).

Almost surely, 2^189110530381 is an apocalyptic number.

It is an amenable number.

189110530381 is a deficient number, since it is larger than the sum of its proper divisors (1).

189110530381 is an equidigital number, since it uses as much as digits as its factorization.

189110530381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The spelling of 189110530381 in words is "one hundred eighty-nine billion, one hundred ten million, five hundred thirty thousand, three hundred eighty-one".