1604377 has 4 divisors (see below), whose sum is σ = 1613520. Its totient is φ = 1595236.

The previous prime is 1604359. The next prime is 1604381. The reversal of 1604377 is 7734061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 7734061 = 137 ⋅56453.

It is a cyclic number.

It is not a de Polignac number, because 1604377 - 2¹⁹ = 1080089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4303 + ... + 4660.

It is an arithmetic number, because the mean of its divisors is an integer number (403380).

2^1604377 is an apocalyptic number.

It is an amenable number.

1604377 is a deficient number, since it is larger than the sum of its proper divisors (9143).

1604377 is an equidigital number, since it uses as much as digits as its factorization.

1604377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9142.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 1604377 is about 1266.6400435799. The cubic root of 1604377 is about 117.0672659684.

The spelling of 1604377 in words is "one million, six hundred four thousand, three hundred seventy-seven".