2931478349 has 2 divisors, whose sum is σ = 2931478350. Its totient is φ = 2931478348.

The previous prime is 2931478343. The next prime is 2931478367. The reversal of 2931478349 is 9438741392.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1574661124 + 1356817225 = 39682^2 + 36835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2931478349 - 2²⁰ = 2930429773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2931478297 and 2931478306.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2931478343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1465739174 + 1465739175.

It is an arithmetic number, because the mean of its divisors is an integer number (1465739175).

Almost surely, 2^2931478349 is an apocalyptic number.

It is an amenable number.

2931478349 is a deficient number, since it is larger than the sum of its proper divisors (1).

2931478349 is an equidigital number, since it uses as much as digits as its factorization.

2931478349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 2931478349 is about 54143.1283636252. The cubic root of 2931478349 is about 1431.1843008330.

The spelling of 2931478349 in words is "two billion, nine hundred thirty-one million, four hundred seventy-eight thousand, three hundred forty-nine".