3973946999987 has 2 divisors, whose sum is σ = 3973946999988. Its totient is φ = 3973946999986.

The previous prime is 3973946999983. The next prime is 3973947000007. The reversal of 3973946999987 is 7899996493793.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3973946999987 - 2² = 3973946999983 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3973946999896 and 3973946999905.

It is not a weakly prime, because it can be changed into another prime (3973946999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986973499993 + 1986973499994.

It is an arithmetic number, because the mean of its divisors is an integer number (1986973499994).

Almost surely, 2^{3973946999987} is an apocalyptic number.

3973946999987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973946999987 is an equidigital number, since it uses as much as digits as its factorization.

3973946999987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44998172352, while the sum is 92.

The spelling of 3973946999987 in words is "three trillion, nine hundred seventy-three billion, nine hundred forty-six million, nine hundred ninety-nine thousand, nine hundred eighty-seven".