109945531 has 2 divisors, whose sum is σ = 109945532. Its totient is φ = 109945530.

The previous prime is 109945529. The next prime is 109945547. The reversal of 109945531 is 135549901.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (135549901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 109945531 - 2¹ = 109945529 is a prime.

It is a super-2 number, since 2×109945531² = 24176039573743922, which contains 22 as substring.

Together with 109945529, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (109945501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54972765 + 54972766.

It is an arithmetic number, because the mean of its divisors is an integer number (54972766).

Almost surely, 2^109945531 is an apocalyptic number.

109945531 is a deficient number, since it is larger than the sum of its proper divisors (1).

109945531 is an equidigital number, since it uses as much as digits as its factorization.

109945531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 109945531 is about 10485.4914524785. The cubic root of 109945531 is about 479.0628866343.

The spelling of 109945531 in words is "one hundred nine million, nine hundred forty-five thousand, five hundred thirty-one".