1604879 has 4 divisors (see below), whose sum is σ = 1615800. Its totient is φ = 1593960.

The previous prime is 1604857. The next prime is 1604923. The reversal of 1604879 is 9784061.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1604879 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 (1604809) 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, 5237 + ... + 5534.

It is an arithmetic number, because the mean of its divisors is an integer number (403950).

2^1604879 is an apocalyptic number.

1604879 is a deficient number, since it is larger than the sum of its proper divisors (10921).

1604879 is a wasteful number, since it uses less digits than its factorization.

1604879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10920.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1604879 is about 1266.8381901411. The cubic root of 1604879 is about 117.0794745783.

The spelling of 1604879 in words is "one million, six hundred four thousand, eight hundred seventy-nine".