106722557 has 2 divisors, whose sum is σ = 106722558. Its totient is φ = 106722556.

The previous prime is 106722547. The next prime is 106722593. The reversal of 106722557 is 755227601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86750596 + 19971961 = 9314^2 + 4469^2 .

It is a cyclic number.

It is not a de Polignac number, because 106722557 - 2⁶ = 106722493 is a prime.

It is a super-2 number, since 2×106722557² = 22779408345236498, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106722527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53361278 + 53361279.

It is an arithmetic number, because the mean of its divisors is an integer number (53361279).

Almost surely, 2^106722557 is an apocalyptic number.

It is an amenable number.

106722557 is a deficient number, since it is larger than the sum of its proper divisors (1).

106722557 is an equidigital number, since it uses as much as digits as its factorization.

106722557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 106722557 is about 10330.6610146689. The cubic root of 106722557 is about 474.3352577826.

The spelling of 106722557 in words is "one hundred six million, seven hundred twenty-two thousand, five hundred fifty-seven".