106615909 has 2 divisors, whose sum is σ = 106615910. Its totient is φ = 106615908.

The previous prime is 106615871. The next prime is 106615937. The reversal of 106615909 is 909516601.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96471684 + 10144225 = 9822^2 + 3185^2 .

It is a cyclic number.

It is not a de Polignac number, because 106615909 - 2⁷ = 106615781 is a prime.

It is a super-2 number, since 2×106615909² = 22733904103792562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (106615939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53307954 + 53307955.

It is an arithmetic number, because the mean of its divisors is an integer number (53307955).

Almost surely, 2^106615909 is an apocalyptic number.

It is an amenable number.

106615909 is a deficient number, since it is larger than the sum of its proper divisors (1).

106615909 is an equidigital number, since it uses as much as digits as its factorization.

106615909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 106615909 is about 10325.4980025178. The cubic root of 106615909 is about 474.1772038282.

The spelling of 106615909 in words is "one hundred six million, six hundred fifteen thousand, nine hundred nine".