2978459899 has 2 divisors, whose sum is σ = 2978459900. Its totient is φ = 2978459898.

The previous prime is 2978459873. The next prime is 2978459977. The reversal of 2978459899 is 9989548792.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2978459899 - 2⁹ = 2978459387 is a prime.

It is not a weakly prime, because it can be changed into another prime (2978459999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489229949 + 1489229950.

It is an arithmetic number, because the mean of its divisors is an integer number (1489229950).

Almost surely, 2^2978459899 is an apocalyptic number.

2978459899 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978459899 is an equidigital number, since it uses as much as digits as its factorization.

2978459899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117573120, while the sum is 70.

The square root of 2978459899 is about 54575.2681990661. The cubic root of 2978459899 is about 1438.7894756911.

The spelling of 2978459899 in words is "two billion, nine hundred seventy-eight million, four hundred fifty-nine thousand, eight hundred ninety-nine".