7921049147 has 16 divisors (see below), whose sum is σ = 8684223840. Its totient is φ = 7165132800.

The previous prime is 7921049119. The next prime is 7921049177. The reversal of 7921049147 is 7419401297.

It is a cyclic number.

It is not a de Polignac number, because 7921049147 - 2²² = 7916854843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7921049098 and 7921049107.

It is not an unprimeable number, because it can be changed into a prime (7921049107) 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 15 ways as a sum of consecutive naturals, for example, 2944379 + ... + 2947067.

It is an arithmetic number, because the mean of its divisors is an integer number (542763990).

Almost surely, 2^7921049147 is an apocalyptic number.

7921049147 is a deficient number, since it is larger than the sum of its proper divisors (763174693).

7921049147 is a wasteful number, since it uses less digits than its factorization.

7921049147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3934.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 7921049147 is about 89000.2761063133. The cubic root of 7921049147 is about 1993.3989996159.

The spelling of 7921049147 in words is "seven billion, nine hundred twenty-one million, forty-nine thousand, one hundred forty-seven".