186942920093 has 2 divisors, whose sum is σ = 186942920094. Its totient is φ = 186942920092.

The previous prime is 186942920089. The next prime is 186942920183. The reversal of 186942920093 is 390029249681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129555363844 + 57387556249 = 359938^2 + 239557^2 .

It is a cyclic number.

It is not a de Polignac number, because 186942920093 - 2² = 186942920089 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186942920063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93471460046 + 93471460047.

It is an arithmetic number, because the mean of its divisors is an integer number (93471460047).

Almost surely, 2^186942920093 is an apocalyptic number.

It is an amenable number.

186942920093 is a deficient number, since it is larger than the sum of its proper divisors (1).

186942920093 is an equidigital number, since it uses as much as digits as its factorization.

186942920093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The spelling of 186942920093 in words is "one hundred eighty-six billion, nine hundred forty-two million, nine hundred twenty thousand, ninety-three".