1604922013 has 4 divisors (see below), whose sum is σ = 1610150080. Its totient is φ = 1599693948.

The previous prime is 1604921993. The next prime is 1604922023. The reversal of 1604922013 is 3102294061.

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-1604922013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604922023) 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, 2613573 + ... + 2614186.

It is an arithmetic number, because the mean of its divisors is an integer number (402537520).

Almost surely, 2^1604922013 is an apocalyptic number.

It is an amenable number.

1604922013 is a deficient number, since it is larger than the sum of its proper divisors (5228067).

1604922013 is an equidigital number, since it uses as much as digits as its factorization.

1604922013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5228066.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 1604922013 is about 40061.4779183195. The cubic root of 1604922013 is about 1170.8052053351.

The spelling of 1604922013 in words is "one billion, six hundred four million, nine hundred twenty-two thousand, thirteen".