106179721 has 4 divisors (see below), whose sum is σ = 108438912. Its totient is φ = 103920532.

The previous prime is 106179691. The next prime is 106179761. The reversal of 106179721 is 127971601.

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 not a de Polignac number, because 106179721 - 2¹³ = 106171529 is a prime.

It is a super-2 number, since 2×106179721² = 22548266303275682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106179761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1129525 + ... + 1129618.

It is an arithmetic number, because the mean of its divisors is an integer number (27109728).

Almost surely, 2^106179721 is an apocalyptic number.

It is an amenable number.

106179721 is a deficient number, since it is larger than the sum of its proper divisors (2259191).

106179721 is an equidigital number, since it uses as much as digits as its factorization.

106179721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259190.

The product of its (nonzero) digits is 5292, while the sum is 34.

The square root of 106179721 is about 10304.3544678937. The cubic root of 106179721 is about 473.5296672234.

The spelling of 106179721 in words is "one hundred six million, one hundred seventy-nine thousand, seven hundred twenty-one".