106329721 has 8 divisors (see below), whose sum is σ = 109951488. Its totient is φ = 102720000.

The previous prime is 106329709. The next prime is 106329731. The reversal of 106329721 is 127923601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 106329721 - 2¹³ = 106321529 is a prime.

It is a super-2 number, since 2×106329721² = 22612019135875682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106329731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17196 + ... + 22546.

It is an arithmetic number, because the mean of its divisors is an integer number (13743936).

Almost surely, 2^106329721 is an apocalyptic number.

It is an amenable number.

106329721 is a deficient number, since it is larger than the sum of its proper divisors (3621767).

106329721 is an equidigital number, since it uses as much as digits as its factorization.

106329721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6023.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 106329721 is about 10311.6303754547. The cubic root of 106329721 is about 473.7525472859.

The spelling of 106329721 in words is "one hundred six million, three hundred twenty-nine thousand, seven hundred twenty-one".