186442540139 has 2 divisors, whose sum is σ = 186442540140. Its totient is φ = 186442540138.

The previous prime is 186442540121. The next prime is 186442540153. The reversal of 186442540139 is 931045244681.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186442540139 is a prime.

It is a super-2 number, since 2×186442540139² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186442540093 and 186442540102.

It is not a weakly prime, because it can be changed into another prime (186442543139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93221270069 + 93221270070.

It is an arithmetic number, because the mean of its divisors is an integer number (93221270070).

Almost surely, 2^186442540139 is an apocalyptic number.

186442540139 is a deficient number, since it is larger than the sum of its proper divisors (1).

186442540139 is an equidigital number, since it uses as much as digits as its factorization.

186442540139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 186442540139 in words is "one hundred eighty-six billion, four hundred forty-two million, five hundred forty thousand, one hundred thirty-nine".