3721197 has 4 divisors (see below), whose sum is σ = 4961600. Its totient is φ = 2480796.

The previous prime is 3721171. The next prime is 3721199. The reversal of 3721197 is 7911273.

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.

It is not a de Polignac number, because 3721197 - 2¹⁶ = 3655661 is a prime.

It is a super-2 number, since 2×3721197² = 27694614225618, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721199) 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, 620197 + ... + 620202.

It is an arithmetic number, because the mean of its divisors is an integer number (1240400).

Almost surely, 2^3721197 is an apocalyptic number.

It is an amenable number.

3721197 is a deficient number, since it is larger than the sum of its proper divisors (1240403).

3721197 is a wasteful number, since it uses less digits than its factorization.

3721197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1240402.

The product of its digits is 2646, while the sum is 30.

The square root of 3721197 is about 1929.0404350350. The cubic root of 3721197 is about 154.9628353491.

The spelling of 3721197 in words is "three million, seven hundred twenty-one thousand, one hundred ninety-seven".