189712288061 has 2 divisors, whose sum is σ = 189712288062. Its totient is φ = 189712288060.

The previous prime is 189712288043. The next prime is 189712288081. The reversal of 189712288061 is 160882217981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 187949127961 + 1763160100 = 433531^2 + 41990^2 .

It is a cyclic number.

It is not a de Polignac number, because 189712288061 - 2¹⁴ = 189712271677 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189712287994 and 189712288012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189712288081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94856144030 + 94856144031.

It is an arithmetic number, because the mean of its divisors is an integer number (94856144031).

Almost surely, 2^189712288061 is an apocalyptic number.

It is an amenable number.

189712288061 is a deficient number, since it is larger than the sum of its proper divisors (1).

189712288061 is an equidigital number, since it uses as much as digits as its factorization.

189712288061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 53.

It can be divided in two parts, 18971 and 2288061, that added together give a palindrome (2307032).

The spelling of 189712288061 in words is "one hundred eighty-nine billion, seven hundred twelve million, two hundred eighty-eight thousand, sixty-one".