106721707 has 2 divisors, whose sum is σ = 106721708. Its totient is φ = 106721706.

The previous prime is 106721683. The next prime is 106721723. The reversal of 106721707 is 707127601.

It is a strong prime.

It is an emirp because it is prime and its reverse (707127601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-106721707 is a prime.

It is a super-2 number, since 2×106721707² = 22779045489987698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (106721107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53360853 + 53360854.

It is an arithmetic number, because the mean of its divisors is an integer number (53360854).

Almost surely, 2^106721707 is an apocalyptic number.

106721707 is a deficient number, since it is larger than the sum of its proper divisors (1).

106721707 is an equidigital number, since it uses as much as digits as its factorization.

106721707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 31.

The square root of 106721707 is about 10330.6198749155. The cubic root of 106721707 is about 474.3339984860. Note that the first 3 decimals are identical.

The spelling of 106721707 in words is "one hundred six million, seven hundred twenty-one thousand, seven hundred seven".