42696109 has 2 divisors, whose sum is σ = 42696110. Its totient is φ = 42696108.

The previous prime is 42696107. The next prime is 42696127. The reversal of 42696109 is 90169624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38378025 + 4318084 = 6195^2 + 2078^2 .

It is a cyclic number.

It is not a de Polignac number, because 42696109 - 2¹ = 42696107 is a prime.

Together with 42696107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42696107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21348054 + 21348055.

It is an arithmetic number, because the mean of its divisors is an integer number (21348055).

Almost surely, 2^42696109 is an apocalyptic number.

It is an amenable number.

42696109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42696109 is an equidigital number, since it uses as much as digits as its factorization.

42696109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 42696109 is about 6534.2259679322. The cubic root of 42696109 is about 349.5125431863.

The spelling of 42696109 in words is "forty-two million, six hundred ninety-six thousand, one hundred nine".