3937949 has 2 divisors, whose sum is σ = 3937950. Its totient is φ = 3937948.

The previous prime is 3937943. The next prime is 3937951. The reversal of 3937949 is 9497393.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3705625 + 232324 = 1925^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 3937949 - 2²⁰ = 2889373 is a prime.

Together with 3937951, it forms a pair of twin primes.

It is a Chen 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 (3937943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1968974 + 1968975.

It is an arithmetic number, because the mean of its divisors is an integer number (1968975).

Almost surely, 2^3937949 is an apocalyptic number.

It is an amenable number.

3937949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3937949 is an equidigital number, since it uses as much as digits as its factorization.

3937949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 44.

The square root of 3937949 is about 1984.4266174389. The cubic root of 3937949 is about 157.9149919259.

The spelling of 3937949 in words is "three million, nine hundred thirty-seven thousand, nine hundred forty-nine".