7749877349 has 4 divisors (see below), whose sum is σ = 7750099980. Its totient is φ = 7749654720.

The previous prime is 7749877279. The next prime is 7749877351. The reversal of 7749877349 is 9437789477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67354849 + 7682522500 = 8207^2 + 87650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7749877349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7749877049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46532 + ... + 132909.

It is an arithmetic number, because the mean of its divisors is an integer number (1937524995).

Almost surely, 2^7749877349 is an apocalyptic number.

It is an amenable number.

7749877349 is a deficient number, since it is larger than the sum of its proper divisors (222631).

7749877349 is a wasteful number, since it uses less digits than its factorization.

7749877349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222630.

The product of its digits is 74680704, while the sum is 65.

The square root of 7749877349 is about 88033.3876946696. The cubic root of 7749877349 is about 1978.9353652289.

The spelling of 7749877349 in words is "seven billion, seven hundred forty-nine million, eight hundred seventy-seven thousand, three hundred forty-nine".