3901957 has 2 divisors, whose sum is σ = 3901958. Its totient is φ = 3901956.

The previous prime is 3901951. The next prime is 3901967. The reversal of 3901957 is 7591093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3587236 + 314721 = 1894^2 + 561^2 .

It is an emirp because it is prime and its reverse (7591093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3901957 - 2⁷ = 3901829 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3901951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950978 + 1950979.

It is an arithmetic number, because the mean of its divisors is an integer number (1950979).

Almost surely, 2^3901957 is an apocalyptic number.

It is an amenable number.

3901957 is a deficient number, since it is larger than the sum of its proper divisors (1).

3901957 is an equidigital number, since it uses as much as digits as its factorization.

3901957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 3901957 is about 1975.3371864064. The cubic root of 3901957 is about 157.4324157837.

It can be divided in two parts, 390 and 1957, that multiplied together give a triangular number (763230 = T₁₂₃₅).

The spelling of 3901957 in words is "three million, nine hundred one thousand, nine hundred fifty-seven".