409601623 has 2 divisors, whose sum is σ = 409601624. Its totient is φ = 409601622.

The previous prime is 409601611. The next prime is 409601653. The reversal of 409601623 is 326106904.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409601623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409601653) 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, 204800811 + 204800812.

It is an arithmetic number, because the mean of its divisors is an integer number (204800812).

Almost surely, 2^409601623 is an apocalyptic number.

409601623 is a deficient number, since it is larger than the sum of its proper divisors (1).

409601623 is an equidigital number, since it uses as much as digits as its factorization.

409601623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 409601623 is about 20238.6171217304. The cubic root of 409601623 is about 742.6551942750.

The spelling of 409601623 in words is "four hundred nine million, six hundred one thousand, six hundred twenty-three".