4002021977 has 2 divisors, whose sum is σ = 4002021978. Its totient is φ = 4002021976.

The previous prime is 4002021967. The next prime is 4002022027. The reversal of 4002021977 is 7791202004.

4002021977 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3965346841 + 36675136 = 62971^2 + 6056^2 .

It is a cyclic number.

It is not a de Polignac number, because 4002021977 - 2⁶ = 4002021913 is a prime.

It is not a weakly prime, because it can be changed into another prime (4002021967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001010988 + 2001010989.

It is an arithmetic number, because the mean of its divisors is an integer number (2001010989).

Almost surely, 2^4002021977 is an apocalyptic number.

It is an amenable number.

4002021977 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002021977 is an equidigital number, since it uses as much as digits as its factorization.

4002021977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 4002021977 is about 63261.5363155211. The cubic root of 4002021977 is about 1587.6684809467.

The spelling of 4002021977 in words is "four billion, two million, twenty-one thousand, nine hundred seventy-seven".