106520729 has 4 divisors (see below), whose sum is σ = 121737984. Its totient is φ = 91303476.

The previous prime is 106520723. The next prime is 106520749. The reversal of 106520729 is 927025601.

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 106520729 - 2²⁰ = 105472153 is a prime.

It is a super-2 number, since 2×106520729² = 22693331413382882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 106520695 and 106520704.

It is not an unprimeable number, because it can be changed into a prime (106520723) 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, 7608617 + ... + 7608630.

It is an arithmetic number, because the mean of its divisors is an integer number (30434496).

Almost surely, 2^106520729 is an apocalyptic number.

It is an amenable number.

106520729 is a deficient number, since it is larger than the sum of its proper divisors (15217255).

106520729 is an equidigital number, since it uses as much as digits as its factorization.

106520729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15217254.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 106520729 is about 10320.8879947415. The cubic root of 106520729 is about 474.0360565900.

The spelling of 106520729 in words is "one hundred six million, five hundred twenty thousand, seven hundred twenty-nine".