113406661 has 2 divisors, whose sum is σ = 113406662. Its totient is φ = 113406660.

The previous prime is 113406659. The next prime is 113406691. The reversal of 113406661 is 166604311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110145025 + 3261636 = 10495^2 + 1806^2 .

It is an emirp because it is prime and its reverse (166604311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113406661 - 2¹ = 113406659 is a prime.

It is a super-2 number, since 2×113406661² = 25722141518337842, which contains 22 as substring.

Together with 113406659, 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 (113406641) 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, 56703330 + 56703331.

It is an arithmetic number, because the mean of its divisors is an integer number (56703331).

Almost surely, 2^113406661 is an apocalyptic number.

It is an amenable number.

113406661 is a deficient number, since it is larger than the sum of its proper divisors (1).

113406661 is an equidigital number, since it uses as much as digits as its factorization.

113406661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 113406661 is about 10649.2563590140. The cubic root of 113406661 is about 484.0380707366.

The spelling of 113406661 in words is "one hundred thirteen million, four hundred six thousand, six hundred sixty-one".