3691873 has 4 divisors (see below), whose sum is σ = 3909060. Its totient is φ = 3474688.

The previous prime is 3691859. The next prime is 3691913. The reversal of 3691873 is 3781963.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3781963 = 41 ⋅92243.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 1595169 = 1448^2 + 1263^2 .

It is a cyclic number.

It is not a de Polignac number, because 3691873 - 2⁵ = 3691841 is a prime.

It is a d-powerful number, because it can be written as 3² + 6² + 9 + 1 + 8⁷ + 7³ + 3¹³ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3691813) 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, 108568 + ... + 108601.

It is an arithmetic number, because the mean of its divisors is an integer number (977265).

Almost surely, 2^3691873 is an apocalyptic number.

It is an amenable number.

3691873 is a deficient number, since it is larger than the sum of its proper divisors (217187).

3691873 is a wasteful number, since it uses less digits than its factorization.

3691873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217186.

The product of its digits is 27216, while the sum is 37.

The square root of 3691873 is about 1921.4247318071. The cubic root of 3691873 is about 154.5547122796.

The spelling of 3691873 in words is "three million, six hundred ninety-one thousand, eight hundred seventy-three".