1608539377 has 4 divisors (see below), whose sum is σ = 1660427776. Its totient is φ = 1556650980.

The previous prime is 1608539353. The next prime is 1608539381. The reversal of 1608539377 is 7739358061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1608539377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1608539377.

It is not an unprimeable number, because it can be changed into a prime (1608534377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25944153 + ... + 25944214.

It is an arithmetic number, because the mean of its divisors is an integer number (415106944).

Almost surely, 2^1608539377 is an apocalyptic number.

It is an amenable number.

1608539377 is a deficient number, since it is larger than the sum of its proper divisors (51888399).

1608539377 is an equidigital number, since it uses as much as digits as its factorization.

1608539377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51888398.

The product of its (nonzero) digits is 952560, while the sum is 49.

The square root of 1608539377 is about 40106.6001675535. The cubic root of 1608539377 is about 1171.6841786001.

The spelling of 1608539377 in words is "one billion, six hundred eight million, five hundred thirty-nine thousand, three hundred seventy-seven".