3921872051 has 2 divisors, whose sum is σ = 3921872052. Its totient is φ = 3921872050.

The previous prime is 3921872047. The next prime is 3921872063. The reversal of 3921872051 is 1502781293.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3921872051 - 2² = 3921872047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3921871996 and 3921872014.

It is not a weakly prime, because it can be changed into another prime (3921872041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1960936025 + 1960936026.

It is an arithmetic number, because the mean of its divisors is an integer number (1960936026).

Almost surely, 2^3921872051 is an apocalyptic number.

3921872051 is a deficient number, since it is larger than the sum of its proper divisors (1).

3921872051 is an equidigital number, since it uses as much as digits as its factorization.

3921872051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 3921872051 is about 62624.8517044152. The cubic root of 3921872051 is about 1576.9979918983.

The spelling of 3921872051 in words is "three billion, nine hundred twenty-one million, eight hundred seventy-two thousand, fifty-one".