105445139 has 2 divisors, whose sum is σ = 105445140. Its totient is φ = 105445138.

The previous prime is 105445129. The next prime is 105445147. The reversal of 105445139 is 931544501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105445139 - 2⁸ = 105444883 is a prime.

It is a super-2 number, since 2×105445139² = 22237354677458642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (105445129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52722569 + 52722570.

It is an arithmetic number, because the mean of its divisors is an integer number (52722570).

Almost surely, 2^105445139 is an apocalyptic number.

105445139 is a deficient number, since it is larger than the sum of its proper divisors (1).

105445139 is an equidigital number, since it uses as much as digits as its factorization.

105445139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 105445139 is about 10268.6483531183. The cubic root of 105445139 is about 472.4351341953.

The spelling of 105445139 in words is "one hundred five million, four hundred forty-five thousand, one hundred thirty-nine".