189121295273 has 2 divisors, whose sum is σ = 189121295274. Its totient is φ = 189121295272.

The previous prime is 189121295269. The next prime is 189121295303. The reversal of 189121295273 is 372592121981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 182340102169 + 6781193104 = 427013^2 + 82348^2 .

It is a cyclic number.

It is not a de Polignac number, because 189121295273 - 2² = 189121295269 is a prime.

It is not a weakly prime, because it can be changed into another prime (189121295203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94560647636 + 94560647637.

It is an arithmetic number, because the mean of its divisors is an integer number (94560647637).

Almost surely, 2^189121295273 is an apocalyptic number.

It is an amenable number.

189121295273 is a deficient number, since it is larger than the sum of its proper divisors (1).

189121295273 is an equidigital number, since it uses as much as digits as its factorization.

189121295273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 50.

The spelling of 189121295273 in words is "one hundred eighty-nine billion, one hundred twenty-one million, two hundred ninety-five thousand, two hundred seventy-three".