3781951 has 2 divisors, whose sum is σ = 3781952. Its totient is φ = 3781950.

The previous prime is 3781909. The next prime is 3781961. The reversal of 3781951 is 1591873.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1591873) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3781951 - 2¹⁵ = 3749183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3781901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890975 + 1890976.

It is an arithmetic number, because the mean of its divisors is an integer number (1890976).

Almost surely, 2^3781951 is an apocalyptic number.

3781951 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781951 is an equidigital number, since it uses as much as digits as its factorization.

3781951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 3781951 is about 1944.7238878566. The cubic root of 3781951 is about 155.8016188586.

The spelling of 3781951 in words is "three million, seven hundred eighty-one thousand, nine hundred fifty-one".