7820949099 has 4 divisors (see below), whose sum is σ = 10427932136. Its totient is φ = 5213966064.

The previous prime is 7820949067. The next prime is 7820949109. The reversal of 7820949099 is 9909490287.

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

It is not a de Polignac number, because 7820949099 - 2⁵ = 7820949067 is a prime.

It is a super-2 number, since 2×7820949099² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7820941099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1303491514 + ... + 1303491519.

It is an arithmetic number, because the mean of its divisors is an integer number (2606983034).

Almost surely, 2^7820949099 is an apocalyptic number.

7820949099 is a deficient number, since it is larger than the sum of its proper divisors (2606983037).

7820949099 is a wasteful number, since it uses less digits than its factorization.

7820949099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606983036.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The square root of 7820949099 is about 88436.1300544071. The cubic root of 7820949099 is about 1984.9663697094.

The spelling of 7820949099 in words is "seven billion, eight hundred twenty million, nine hundred forty-nine thousand, ninety-nine".