15700109 has 2 divisors, whose sum is σ = 15700110. Its totient is φ = 15700108.

The previous prime is 15700093. The next prime is 15700133. The reversal of 15700109 is 90100751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13801225 + 1898884 = 3715^2 + 1378^2 .

It is a cyclic number.

It is not a de Polignac number, because 15700109 - 2⁴ = 15700093 is a prime.

It is a super-2 number, since 2×15700109² = 492986845223762, 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 (15700169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7850054 + 7850055.

It is an arithmetic number, because the mean of its divisors is an integer number (7850055).

Almost surely, 2^15700109 is an apocalyptic number.

It is an amenable number.

15700109 is a deficient number, since it is larger than the sum of its proper divisors (1).

15700109 is an equidigital number, since it uses as much as digits as its factorization.

15700109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 23.

The square root of 15700109 is about 3962.3363057671. The cubic root of 15700109 is about 250.3999411804.

The spelling of 15700109 in words is "fifteen million, seven hundred thousand, one hundred nine".