7834785149 has 4 divisors (see below), whose sum is σ = 7852632480. Its totient is φ = 7816937820.

The previous prime is 7834785143. The next prime is 7834785169. The reversal of 7834785149 is 9415874387.

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.

It is a cyclic number.

It is not a de Polignac number, because 7834785149 - 2²⁴ = 7818007933 is a prime.

It is a super-2 number, since 2×7834785149² (a number of 21 digits) contains 22 as substring.

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 = 7834785094 and 7834785103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7834785143) 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, 8923007 + ... + 8923884.

It is an arithmetic number, because the mean of its divisors is an integer number (1963158120).

Almost surely, 2^7834785149 is an apocalyptic number.

It is an amenable number.

7834785149 is a deficient number, since it is larger than the sum of its proper divisors (17847331).

7834785149 is a wasteful number, since it uses less digits than its factorization.

7834785149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17847330.

The product of its digits is 6773760, while the sum is 56.

The square root of 7834785149 is about 88514.3217168838. The cubic root of 7834785149 is about 1986.1362155472.

The spelling of 7834785149 in words is "seven billion, eight hundred thirty-four million, seven hundred eighty-five thousand, one hundred forty-nine".