2471691449 has 2 divisors, whose sum is σ = 2471691450. Its totient is φ = 2471691448.

The previous prime is 2471691433. The next prime is 2471691457. The reversal of 2471691449 is 9441961742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2471581225 + 110224 = 49715^2 + 332^2 .

It is a cyclic number.

It is not a de Polignac number, because 2471691449 - 2⁴ = 2471691433 is a prime.

It is a super-2 number, since 2×2471691449² = 12218517238119439202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2471691479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1235845724 + 1235845725.

It is an arithmetic number, because the mean of its divisors is an integer number (1235845725).

Almost surely, 2^2471691449 is an apocalyptic number.

It is an amenable number.

2471691449 is a deficient number, since it is larger than the sum of its proper divisors (1).

2471691449 is an equidigital number, since it uses as much as digits as its factorization.

2471691449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 2471691449 is about 49716.1085464259. The cubic root of 2471691449 is about 1352.0666014204.

The spelling of 2471691449 in words is "two billion, four hundred seventy-one million, six hundred ninety-one thousand, four hundred forty-nine".