3949157 has 2 divisors, whose sum is σ = 3949158. Its totient is φ = 3949156.

The previous prime is 3949147. The next prime is 3949177. The reversal of 3949157 is 7519493.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2869636 + 1079521 = 1694^2 + 1039^2 .

It is an emirp because it is prime and its reverse (7519493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3949157 - 2²⁰ = 2900581 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3949157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3949147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974578 + 1974579.

It is an arithmetic number, because the mean of its divisors is an integer number (1974579).

Almost surely, 2^3949157 is an apocalyptic number.

It is an amenable number.

3949157 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949157 is an equidigital number, since it uses as much as digits as its factorization.

3949157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 3949157 is about 1987.2486004524. The cubic root of 3949157 is about 158.0646666876.

The spelling of 3949157 in words is "three million, nine hundred forty-nine thousand, one hundred fifty-seven".