2978581349 has 2 divisors, whose sum is σ = 2978581350. Its totient is φ = 2978581348.

The previous prime is 2978581343. The next prime is 2978581357. The reversal of 2978581349 is 9431858792.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2107269025 + 871312324 = 45905^2 + 29518^2 .

It is a cyclic number.

It is not a de Polignac number, because 2978581349 - 2¹² = 2978577253 is a prime.

It is a super-2 number, since 2×2978581349² = 17743893705221319602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2978581294 and 2978581303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2978581343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489290674 + 1489290675.

It is an arithmetic number, because the mean of its divisors is an integer number (1489290675).

Almost surely, 2^2978581349 is an apocalyptic number.

It is an amenable number.

2978581349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2978581349 is an equidigital number, since it uses as much as digits as its factorization.

2978581349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 2978581349 is about 54576.3808712157. The cubic root of 2978581349 is about 1438.8090315033.

The spelling of 2978581349 in words is "two billion, nine hundred seventy-eight million, five hundred eighty-one thousand, three hundred forty-nine".