113616421 has 4 divisors (see below), whose sum is σ = 114893100. Its totient is φ = 112339744.

The previous prime is 113616407. The next prime is 113616443. The reversal of 113616421 is 124616311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65383396 + 48233025 = 8086^2 + 6945^2 .

It is a cyclic number.

It is not a de Polignac number, because 113616421 - 2²³ = 105227813 is a prime.

It is a super-2 number, since 2×113616421² = 25817382241698482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113616521) 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 in 3 ways as a sum of consecutive naturals, for example, 638206 + ... + 638383.

It is an arithmetic number, because the mean of its divisors is an integer number (28723275).

Almost surely, 2^113616421 is an apocalyptic number.

It is an amenable number.

113616421 is a deficient number, since it is larger than the sum of its proper divisors (1276679).

113616421 is an equidigital number, since it uses as much as digits as its factorization.

113616421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276678.

The product of its digits is 864, while the sum is 25.

The square root of 113616421 is about 10659.1003841788. The cubic root of 113616421 is about 484.3363168608.

The spelling of 113616421 in words is "one hundred thirteen million, six hundred sixteen thousand, four hundred twenty-one".