106921919 has 4 divisors (see below), whose sum is σ = 115146696. Its totient is φ = 98697144.

The previous prime is 106921909. The next prime is 106921921. The reversal of 106921919 is 919129601.

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

It is not a de Polignac number, because 106921919 - 2¹⁶ = 106856383 is a prime.

It is a super-2 number, since 2×106921919² = 22864593525285122, 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 (106921909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4112369 + ... + 4112394.

It is an arithmetic number, because the mean of its divisors is an integer number (28786674).

Almost surely, 2^106921919 is an apocalyptic number.

106921919 is a deficient number, since it is larger than the sum of its proper divisors (8224777).

106921919 is an equidigital number, since it uses as much as digits as its factorization.

106921919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224776.

The product of its (nonzero) digits is 8748, while the sum is 38.

The square root of 106921919 is about 10340.3055564137. The cubic root of 106921919 is about 474.6304331294.

The spelling of 106921919 in words is "one hundred six million, nine hundred twenty-one thousand, nine hundred nineteen".