106389257 has 4 divisors (see below), whose sum is σ = 114573060. Its totient is φ = 98205456.

The previous prime is 106389211. The next prime is 106389271. The reversal of 106389257 is 752983601.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69288976 + 37100281 = 8324^2 + 6091^2 .

It is a cyclic number.

It is not a de Polignac number, because 106389257 - 2⁸ = 106389001 is a prime.

It is a super-2 number, since 2×106389257² = 22637348010024098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106389287) 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, 4091882 + ... + 4091907.

It is an arithmetic number, because the mean of its divisors is an integer number (28643265).

Almost surely, 2^106389257 is an apocalyptic number.

It is an amenable number.

106389257 is a deficient number, since it is larger than the sum of its proper divisors (8183803).

106389257 is an equidigital number, since it uses as much as digits as its factorization.

106389257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8183802.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 106389257 is about 10314.5168088476. The cubic root of 106389257 is about 473.8409517596.

The spelling of 106389257 in words is "one hundred six million, three hundred eighty-nine thousand, two hundred fifty-seven".