186131641 has 2 divisors, whose sum is σ = 186131642. Its totient is φ = 186131640.

The previous prime is 186131639. The next prime is 186131681. The reversal of 186131641 is 146131681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184389241 + 1742400 = 13579^2 + 1320^2 .

It is a cyclic number.

It is not a de Polignac number, because 186131641 - 2¹ = 186131639 is a prime.

Together with 186131639, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (186131681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93065820 + 93065821.

It is an arithmetic number, because the mean of its divisors is an integer number (93065821).

Almost surely, 2^186131641 is an apocalyptic number.

It is an amenable number.

186131641 is a deficient number, since it is larger than the sum of its proper divisors (1).

186131641 is an equidigital number, since it uses as much as digits as its factorization.

186131641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 186131641 is about 13643.0070365737. The cubic root of 186131641 is about 570.9613826129.

The spelling of 186131641 in words is "one hundred eighty-six million, one hundred thirty-one thousand, six hundred forty-one".