7999992493 has 4 divisors (see below), whose sum is σ = 8000190268. Its totient is φ = 7999794720.

The previous prime is 7999992479. The next prime is 7999992499. The reversal of 7999992493 is 3942999997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3942999997 = 7129 ⋅553093.

It can be written as a sum of positive squares in 2 ways, for example, as 6197310729 + 1802681764 = 78723^2 + 42458^2 .

It is a cyclic number.

It is not a de Polignac number, because 7999992493 - 2⁹ = 7999991981 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 (7999992499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13818 + ... + 127243.

It is an arithmetic number, because the mean of its divisors is an integer number (2000047567).

Almost surely, 2^7999992493 is an apocalyptic number.

It is an amenable number.

7999992493 is a deficient number, since it is larger than the sum of its proper divisors (197775).

7999992493 is a wasteful number, since it uses less digits than its factorization.

7999992493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197774.

The product of its digits is 89282088, while the sum is 70.

The square root of 7999992493 is about 89442.6771345760. The cubic root of 7999992493 is about 1999.9993744165. Note that the first 3 decimals are identical.

The spelling of 7999992493 in words is "seven billion, nine hundred ninety-nine million, nine hundred ninety-two thousand, four hundred ninety-three".