189828847477 has 2 divisors, whose sum is σ = 189828847478. Its totient is φ = 189828847476.

The previous prime is 189828847471. The next prime is 189828847489. The reversal of 189828847477 is 774748828981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184963645476 + 4865202001 = 430074^2 + 69751^2 .

It is an emirp because it is prime and its reverse (774748828981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189828847477 - 2²³ = 189820458869 is a prime.

It is a super-2 number, since 2×189828847477² (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 (189828847471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94914423738 + 94914423739.

It is an arithmetic number, because the mean of its divisors is an integer number (94914423739).

Almost surely, 2^189828847477 is an apocalyptic number.

It is an amenable number.

189828847477 is a deficient number, since it is larger than the sum of its proper divisors (1).

189828847477 is an equidigital number, since it uses as much as digits as its factorization.

189828847477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 404619264, while the sum is 73.

The spelling of 189828847477 in words is "one hundred eighty-nine billion, eight hundred twenty-eight million, eight hundred forty-seven thousand, four hundred seventy-seven".