3953657 has 4 divisors (see below), whose sum is σ = 4090020. Its totient is φ = 3817296.

The previous prime is 3953629. The next prime is 3953669. The reversal of 3953657 is 7563593.

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 817216 + 3136441 = 904^2 + 1771^2 .

It is a cyclic number.

It is not a de Polignac number, because 3953657 - 2¹⁰ = 3952633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3953657.

It is not an unprimeable number, because it can be changed into a prime (3953617) 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, 68138 + ... + 68195.

It is an arithmetic number, because the mean of its divisors is an integer number (1022505).

Almost surely, 2^3953657 is an apocalyptic number.

It is an amenable number.

3953657 is a deficient number, since it is larger than the sum of its proper divisors (136363).

3953657 is a wasteful number, since it uses less digits than its factorization.

3953657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136362.

The product of its digits is 85050, while the sum is 38.

The square root of 3953657 is about 1988.3804967863. The cubic root of 3953657 is about 158.1246812681.

It can be divided in two parts, 39536 and 57, that added together give a palindrome (39593).

The spelling of 3953657 in words is "three million, nine hundred fifty-three thousand, six hundred fifty-seven".