1609106399 has 2 divisors, whose sum is σ = 1609106400. Its totient is φ = 1609106398.

The previous prime is 1609106353. The next prime is 1609106407. The reversal of 1609106399 is 9936019061.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (9936019061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1609106399 - 2¹² = 1609102303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1609106099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804553199 + 804553200.

It is an arithmetic number, because the mean of its divisors is an integer number (804553200).

Almost surely, 2^1609106399 is an apocalyptic number.

1609106399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1609106399 is an equidigital number, since it uses as much as digits as its factorization.

1609106399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 1609106399 is about 40113.6684809555. The cubic root of 1609106399 is about 1171.8218381990.

The spelling of 1609106399 in words is "one billion, six hundred nine million, one hundred six thousand, three hundred ninety-nine".