106369421 has 4 divisors (see below), whose sum is σ = 108113244. Its totient is φ = 104625600.

The previous prime is 106369409. The next prime is 106369423. The reversal of 106369421 is 124963601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14478025 + 91891396 = 3805^2 + 9586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106369421 is a prime.

It is a super-2 number, since 2×106369421² = 22628907447750482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106369423) 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, 871820 + ... + 871941.

It is an arithmetic number, because the mean of its divisors is an integer number (27028311).

Almost surely, 2^106369421 is an apocalyptic number.

It is an amenable number.

106369421 is a deficient number, since it is larger than the sum of its proper divisors (1743823).

106369421 is an equidigital number, since it uses as much as digits as its factorization.

106369421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743822.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 106369421 is about 10313.5552066201. Note that the first 3 decimals coincide. The cubic root of 106369421 is about 473.8115011252.

The spelling of 106369421 in words is "one hundred six million, three hundred sixty-nine thousand, four hundred twenty-one".