186947901949 has 2 divisors, whose sum is σ = 186947901950. Its totient is φ = 186947901948.

The previous prime is 186947901941. The next prime is 186947901967. The reversal of 186947901949 is 949109749681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142223265625 + 44724636324 = 377125^2 + 211482^2 .

It is a cyclic number.

It is not a de Polignac number, because 186947901949 - 2³ = 186947901941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186947901941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93473950974 + 93473950975.

It is an arithmetic number, because the mean of its divisors is an integer number (93473950975).

Almost surely, 2^186947901949 is an apocalyptic number.

It is an amenable number.

186947901949 is a deficient number, since it is larger than the sum of its proper divisors (1).

186947901949 is an equidigital number, since it uses as much as digits as its factorization.

186947901949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35271936, while the sum is 67.

The spelling of 186947901949 in words is "one hundred eighty-six billion, nine hundred forty-seven million, nine hundred one thousand, nine hundred forty-nine".