1604273101 has 4 divisors (see below), whose sum is σ = 1619848672. Its totient is φ = 1588697532.

The previous prime is 1604273093. The next prime is 1604273107. The reversal of 1604273101 is 1013724061.

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: 1013724061 = 7 ⋅144817723.

It is a cyclic number.

It is not a de Polignac number, because 1604273101 - 2³ = 1604273093 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 (1604273107) 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, 7787631 + ... + 7787836.

It is an arithmetic number, because the mean of its divisors is an integer number (404962168).

Almost surely, 2^1604273101 is an apocalyptic number.

It is an amenable number.

1604273101 is a deficient number, since it is larger than the sum of its proper divisors (15575571).

1604273101 is a wasteful number, since it uses less digits than its factorization.

1604273101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15575570.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1604273101 is about 40053.3781471676. The cubic root of 1604273101 is about 1170.6473883280.

Adding to 1604273101 its reverse (1013724061), we get a palindrome (2617997162).

The spelling of 1604273101 in words is "one billion, six hundred four million, two hundred seventy-three thousand, one hundred one".