189606648839 has 2 divisors, whose sum is σ = 189606648840. Its totient is φ = 189606648838.

The previous prime is 189606648809. The next prime is 189606648863. The reversal of 189606648839 is 938846606981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189606648839 - 2¹² = 189606644743 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189606648809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94803324419 + 94803324420.

It is an arithmetic number, because the mean of its divisors is an integer number (94803324420).

Almost surely, 2^189606648839 is an apocalyptic number.

189606648839 is a deficient number, since it is larger than the sum of its proper divisors (1).

189606648839 is an equidigital number, since it uses as much as digits as its factorization.

189606648839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 189606648839 in words is "one hundred eighty-nine billion, six hundred six million, six hundred forty-eight thousand, eight hundred thirty-nine".