7920489247 has 8 divisors (see below), whose sum is σ = 8679283200. Its totient is φ = 7168153560.

The previous prime is 7920489191. The next prime is 7920489287. The reversal of 7920489247 is 7429840297.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7920489247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7920489194 and 7920489203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7920489287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1611997 + ... + 1616902.

It is an arithmetic number, because the mean of its divisors is an integer number (1084910400).

Almost surely, 2^7920489247 is an apocalyptic number.

7920489247 is a deficient number, since it is larger than the sum of its proper divisors (758793953).

7920489247 is a wasteful number, since it uses less digits than its factorization.

7920489247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229133.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 7920489247 is about 88997.1305548668. The cubic root of 7920489247 is about 1993.3520306526.

The spelling of 7920489247 in words is "seven billion, nine hundred twenty million, four hundred eighty-nine thousand, two hundred forty-seven".