3780421951 has 2 divisors, whose sum is σ = 3780421952. Its totient is φ = 3780421950.

The previous prime is 3780421949. The next prime is 3780422011. The reversal of 3780421951 is 1591240873.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3780421951 - 2¹ = 3780421949 is a prime.

Together with 3780421949, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3780421901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890210975 + 1890210976.

It is an arithmetic number, because the mean of its divisors is an integer number (1890210976).

Almost surely, 2^3780421951 is an apocalyptic number.

3780421951 is a deficient number, since it is larger than the sum of its proper divisors (1).

3780421951 is an equidigital number, since it uses as much as digits as its factorization.

3780421951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3780421951 is about 61485.1360167642. The cubic root of 3780421951 is about 1557.8061907818.

The spelling of 3780421951 in words is "three billion, seven hundred eighty million, four hundred twenty-one thousand, nine hundred fifty-one".