3657697 has 4 divisors (see below), whose sum is σ = 3690180. Its totient is φ = 3625216.

The previous prime is 3657691. The next prime is 3657749. The reversal of 3657697 is 7967563.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7967563 = 353 ⋅22571.

It can be written as a sum of positive squares in 2 ways, for example, as 108241 + 3549456 = 329^2 + 1884^2 .

It is a cyclic number.

It is not a de Polignac number, because 3657697 - 2¹¹ = 3655649 is a prime.

It is a d-powerful number, because it can be written as 3¹³ + 6⁶ + 5⁹ + 7² + 6⁶ + 9² + 7⁵ .

It is a Duffinian number.

3657697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3657691) 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, 16072 + ... + 16297.

It is an arithmetic number, because the mean of its divisors is an integer number (922545).

Almost surely, 2^3657697 is an apocalyptic number.

It is an amenable number.

3657697 is a deficient number, since it is larger than the sum of its proper divisors (32483).

3657697 is a wasteful number, since it uses less digits than its factorization.

3657697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32482.

The product of its digits is 238140, while the sum is 43.

The square root of 3657697 is about 1912.5106535651. The cubic root of 3657697 is about 154.0763241164.

It can be divided in two parts, 3 and 657697, that multiplied together give a triangular number (1973091 = T₁₉₈₆).

The spelling of 3657697 in words is "three million, six hundred fifty-seven thousand, six hundred ninety-seven".