3994537 has 2 divisors, whose sum is σ = 3994538. Its totient is φ = 3994536.

The previous prime is 3994513. The next prime is 3994553. The reversal of 3994537 is 7354993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3956121 + 38416 = 1989^2 + 196^2 .

It is a cyclic number.

It is not a de Polignac number, because 3994537 - 2¹⁹ = 3470249 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3994537.

It is not a weakly prime, because it can be changed into another prime (3994597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1997268 + 1997269.

It is an arithmetic number, because the mean of its divisors is an integer number (1997269).

Almost surely, 2^3994537 is an apocalyptic number.

It is an amenable number.

3994537 is a deficient number, since it is larger than the sum of its proper divisors (1).

3994537 is an equidigital number, since it uses as much as digits as its factorization.

3994537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 3994537 is about 1998.6337833630. The cubic root of 3994537 is about 158.6678058397.

The spelling of 3994537 in words is "three million, nine hundred ninety-four thousand, five hundred thirty-seven".