2261749279 has 2 divisors, whose sum is σ = 2261749280. Its totient is φ = 2261749278.

The previous prime is 2261749271. The next prime is 2261749307. The reversal of 2261749279 is 9729471622.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2261749279 - 2³ = 2261749271 is a prime.

It is a super-3 number, since 3×2261749279³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2261749271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130874639 + 1130874640.

It is an arithmetic number, because the mean of its divisors is an integer number (1130874640).

Almost surely, 2^2261749279 is an apocalyptic number.

2261749279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261749279 is an equidigital number, since it uses as much as digits as its factorization.

2261749279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 2261749279 is about 47557.8519174279. The cubic root of 2261749279 is about 1312.6476141035.

The spelling of 2261749279 in words is "two billion, two hundred sixty-one million, seven hundred forty-nine thousand, two hundred seventy-nine".