189215429993 has 2 divisors, whose sum is σ = 189215429994. Its totient is φ = 189215429992.

The previous prime is 189215429989. The next prime is 189215430013. The reversal of 189215429993 is 399924512981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188587827289 + 627602704 = 434267^2 + 25052^2 .

It is a cyclic number.

It is not a de Polignac number, because 189215429993 - 2² = 189215429989 is a prime.

It is not a weakly prime, because it can be changed into another prime (189215429693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94607714996 + 94607714997.

It is an arithmetic number, because the mean of its divisors is an integer number (94607714997).

Almost surely, 2^189215429993 is an apocalyptic number.

It is an amenable number.

189215429993 is a deficient number, since it is larger than the sum of its proper divisors (1).

189215429993 is an equidigital number, since it uses as much as digits as its factorization.

189215429993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 62.

The spelling of 189215429993 in words is "one hundred eighty-nine billion, two hundred fifteen million, four hundred twenty-nine thousand, nine hundred ninety-three".