186145457 has 4 divisors (see below), whose sum is σ = 188767296. Its totient is φ = 183523620.

The previous prime is 186145423. The next prime is 186145481. The reversal of 186145457 is 754541681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-186145457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (186142457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310813 + ... + 1310954.

It is an arithmetic number, because the mean of its divisors is an integer number (47191824).

Almost surely, 2^186145457 is an apocalyptic number.

It is an amenable number.

186145457 is a deficient number, since it is larger than the sum of its proper divisors (2621839).

186145457 is an equidigital number, since it uses as much as digits as its factorization.

186145457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621838.

The product of its digits is 134400, while the sum is 41.

The square root of 186145457 is about 13643.5133671646. The cubic root of 186145457 is about 570.9755091870.

The spelling of 186145457 in words is "one hundred eighty-six million, one hundred forty-five thousand, four hundred fifty-seven".