3901657 has 2 divisors, whose sum is σ = 3901658. Its totient is φ = 3901656.

The previous prime is 3901649. The next prime is 3901661. The reversal of 3901657 is 7561093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2253001 + 1648656 = 1501^2 + 1284^2 .

It is an emirp because it is prime and its reverse (7561093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3901657 - 2³ = 3901649 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3901757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950828 + 1950829.

It is an arithmetic number, because the mean of its divisors is an integer number (1950829).

Almost surely, 2^3901657 is an apocalyptic number.

It is an amenable number.

3901657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3901657 is an equidigital number, since it uses as much as digits as its factorization.

3901657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 3901657 is about 1975.2612485441. The cubic root of 3901657 is about 157.4283809763.

The spelling of 3901657 in words is "three million, nine hundred one thousand, six hundred fifty-seven".