2861720039 has 2 divisors, whose sum is σ = 2861720040. Its totient is φ = 2861720038.

The previous prime is 2861720033. The next prime is 2861720051. The reversal of 2861720039 is 9300271682.

2861720039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2861720039 - 2¹² = 2861715943 is a prime.

It is a super-2 number, since 2×2861720039² = 16378883163228323042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2861719984 and 2861720011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2861720033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1430860019 + 1430860020.

It is an arithmetic number, because the mean of its divisors is an integer number (1430860020).

Almost surely, 2^2861720039 is an apocalyptic number.

2861720039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2861720039 is an equidigital number, since it uses as much as digits as its factorization.

2861720039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 2861720039 is about 53495.0468641724. The cubic root of 2861720039 is about 1419.7407512900.

The spelling of 2861720039 in words is "two billion, eight hundred sixty-one million, seven hundred twenty thousand, thirty-nine".