189827586349 has 2 divisors, whose sum is σ = 189827586350. Its totient is φ = 189827586348.

The previous prime is 189827586341. The next prime is 189827586397. The reversal of 189827586349 is 943685728981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100516263849 + 89311322500 = 317043^2 + 298850^2 .

It is a cyclic number.

It is not a de Polignac number, because 189827586349 - 2³ = 189827586341 is a prime.

It is a super-2 number, since 2×189827586349² (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 (189827586341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94913793174 + 94913793175.

It is an arithmetic number, because the mean of its divisors is an integer number (94913793175).

Almost surely, 2^189827586349 is an apocalyptic number.

It is an amenable number.

189827586349 is a deficient number, since it is larger than the sum of its proper divisors (1).

189827586349 is an equidigital number, since it uses as much as digits as its factorization.

189827586349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209018880, while the sum is 70.

The spelling of 189827586349 in words is "one hundred eighty-nine billion, eight hundred twenty-seven million, five hundred eighty-six thousand, three hundred forty-nine".