1604377073 has 4 divisors (see below), whose sum is σ = 1727790708. Its totient is φ = 1480963440.

The previous prime is 1604377039. The next prime is 1604377097. The reversal of 1604377073 is 3707734061.

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

It can be written as a sum of positive squares in 2 ways, for example, as 250652224 + 1353724849 = 15832^2 + 36793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1604377073 - 2⁸ = 1604376817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1604377013) 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, 61706798 + ... + 61706823.

It is an arithmetic number, because the mean of its divisors is an integer number (431947677).

Almost surely, 2^1604377073 is an apocalyptic number.

1604377073 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1604377073 is a deficient number, since it is larger than the sum of its proper divisors (123413635).

1604377073 is a wasteful number, since it uses less digits than its factorization.

1604377073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123413634.

The product of its (nonzero) digits is 74088, while the sum is 38.

The square root of 1604377073 is about 40054.6760441275. The cubic root of 1604377073 is about 1170.6726774389.

The spelling of 1604377073 in words is "one billion, six hundred four million, three hundred seventy-seven thousand, seventy-three".