189194380469 has 2 divisors, whose sum is σ = 189194380470. Its totient is φ = 189194380468.

The previous prime is 189194380457. The next prime is 189194380477. The reversal of 189194380469 is 964083491981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127956444100 + 61237936369 = 357710^2 + 247463^2 .

It is a cyclic number.

It is not a de Polignac number, because 189194380469 - 2²⁰ = 189193331893 is a prime.

It is a super-2 number, since 2×189194380469² (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 (189194380429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94597190234 + 94597190235.

It is an arithmetic number, because the mean of its divisors is an integer number (94597190235).

Almost surely, 2^189194380469 is an apocalyptic number.

It is an amenable number.

189194380469 is a deficient number, since it is larger than the sum of its proper divisors (1).

189194380469 is an equidigital number, since it uses as much as digits as its factorization.

189194380469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 62.

The spelling of 189194380469 in words is "one hundred eighty-nine billion, one hundred ninety-four million, three hundred eighty thousand, four hundred sixty-nine".