2919860989 has 2 divisors, whose sum is σ = 2919860990. Its totient is φ = 2919860988.

The previous prime is 2919860987. The next prime is 2919861011. The reversal of 2919860989 is 9890689192.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2566232964 + 353628025 = 50658^2 + 18805^2 .

It is a cyclic number.

It is not a de Polignac number, because 2919860989 - 2¹ = 2919860987 is a prime.

Together with 2919860987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2919860987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1459930494 + 1459930495.

It is an arithmetic number, because the mean of its divisors is an integer number (1459930495).

Almost surely, 2^2919860989 is an apocalyptic number.

It is an amenable number.

2919860989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2919860989 is an equidigital number, since it uses as much as digits as its factorization.

2919860989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5038848, while the sum is 61.

The square root of 2919860989 is about 54035.7380721315. The cubic root of 2919860989 is about 1429.2912178557.

The spelling of 2919860989 in words is "two billion, nine hundred nineteen million, eight hundred sixty thousand, nine hundred eighty-nine".