3942493 has 2 divisors, whose sum is σ = 3942494. Its totient is φ = 3942492.

The previous prime is 3942479. The next prime is 3942503.

3942493 is nontrivially palindromic in base 10.

3942493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3090564 + 851929 = 1758^2 + 923^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3942493 is a prime.

3942493 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3942403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1971246 + 1971247.

It is an arithmetic number, because the mean of its divisors is an integer number (1971247).

Almost surely, 2^3942493 is an apocalyptic number.

It is an amenable number.

3942493 is a deficient number, since it is larger than the sum of its proper divisors (1).

3942493 is an equidigital number, since it uses as much as digits as its factorization.

3942493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 34.

The square root of 3942493 is about 1985.5712024503. The cubic root of 3942493 is about 157.9757079569.

It can be divided in two parts, 3942 and 493, that multiplied together give a triangular number (1943406 = T₁₉₇₁).

The spelling of 3942493 in words is "three million, nine hundred forty-two thousand, four hundred ninety-three".