106721677 has 4 divisors (see below), whose sum is σ = 106777116. Its totient is φ = 106666240.

The previous prime is 106721611. The next prime is 106721683. The reversal of 106721677 is 776127601.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 776127601 = 53 ⋅14643917.

It can be written as a sum of positive squares in 2 ways, for example, as 29387241 + 77334436 = 5421^2 + 8794^2 .

It is a cyclic number.

It is not a de Polignac number, because 106721677 - 2¹⁵ = 106688909 is a prime.

It is a super-2 number, since 2×106721677² = 22779032683384658, 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 (106721977) 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, 24724 + ... + 28717.

It is an arithmetic number, because the mean of its divisors is an integer number (26694279).

Almost surely, 2^106721677 is an apocalyptic number.

It is an amenable number.

106721677 is a deficient number, since it is larger than the sum of its proper divisors (55439).

106721677 is an equidigital number, since it uses as much as digits as its factorization.

106721677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55438.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 106721677 is about 10330.6184229213. The cubic root of 106721677 is about 474.3339540402. Note that the first 3 decimals are identical.

The spelling of 106721677 in words is "one hundred six million, seven hundred twenty-one thousand, six hundred seventy-seven".