2120339987 has 2 divisors, whose sum is σ = 2120339988. Its totient is φ = 2120339986.

The previous prime is 2120339983. The next prime is 2120340029. The reversal of 2120339987 is 7899330212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2120339987 - 2² = 2120339983 is a prime.

It is not a weakly prime, because it can be changed into another prime (2120339983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060169993 + 1060169994.

It is an arithmetic number, because the mean of its divisors is an integer number (1060169994).

Almost surely, 2^2120339987 is an apocalyptic number.

2120339987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120339987 is an equidigital number, since it uses as much as digits as its factorization.

2120339987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 2120339987 is about 46047.1496077662. The cubic root of 2120339987 is about 1284.7003266932.

The spelling of 2120339987 in words is "two billion, one hundred twenty million, three hundred thirty-nine thousand, nine hundred eighty-seven".