105551389 has 2 divisors, whose sum is σ = 105551390. Its totient is φ = 105551388.

The previous prime is 105551333. The next prime is 105551437. The reversal of 105551389 is 983155501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103124025 + 2427364 = 10155^2 + 1558^2 .

It is a cyclic number.

It is not a de Polignac number, because 105551389 - 2¹³ = 105543197 is a prime.

It is a super-2 number, since 2×105551389² = 22282191439658642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105551309) 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 as a sum of consecutive naturals, namely, 52775694 + 52775695.

It is an arithmetic number, because the mean of its divisors is an integer number (52775695).

Almost surely, 2^105551389 is an apocalyptic number.

It is an amenable number.

105551389 is a deficient number, since it is larger than the sum of its proper divisors (1).

105551389 is an equidigital number, since it uses as much as digits as its factorization.

105551389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 37.

The square root of 105551389 is about 10273.8205649116. The cubic root of 105551389 is about 472.5937613358.

The spelling of 105551389 in words is "one hundred five million, five hundred fifty-one thousand, three hundred eighty-nine".