7749357149 has 4 divisors (see below), whose sum is σ = 7865019264. Its totient is φ = 7633695036.

The previous prime is 7749357137. The next prime is 7749357229. The reversal of 7749357149 is 9417539477.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9417539477 = 337 ⋅27945221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7749357149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7749357094 and 7749357103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7749357449) 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, 57830957 + ... + 57831090.

It is an arithmetic number, because the mean of its divisors is an integer number (1966254816).

Almost surely, 2^7749357149 is an apocalyptic number.

It is an amenable number.

7749357149 is a deficient number, since it is larger than the sum of its proper divisors (115662115).

7749357149 is a wasteful number, since it uses less digits than its factorization.

7749357149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115662114.

The product of its digits is 6667920, while the sum is 56.

The square root of 7749357149 is about 88030.4330842465. The cubic root of 7749357149 is about 1978.8910864546.

The spelling of 7749357149 in words is "seven billion, seven hundred forty-nine million, three hundred fifty-seven thousand, one hundred forty-nine".