116605421 has 2 divisors, whose sum is σ = 116605422. Its totient is φ = 116605420.

The previous prime is 116605403. The next prime is 116605429. The reversal of 116605421 is 124506611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112254025 + 4351396 = 10595^2 + 2086^2 .

It is a cyclic number.

It is not a de Polignac number, because 116605421 - 2¹⁴ = 116589037 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (116605429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58302710 + 58302711.

It is an arithmetic number, because the mean of its divisors is an integer number (58302711).

Almost surely, 2^116605421 is an apocalyptic number.

It is an amenable number.

116605421 is a deficient number, since it is larger than the sum of its proper divisors (1).

116605421 is an equidigital number, since it uses as much as digits as its factorization.

116605421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 116605421 is about 10798.3990017039. The cubic root of 116605421 is about 488.5468833720.

The spelling of 116605421 in words is "one hundred sixteen million, six hundred five thousand, four hundred twenty-one".