7720312387 has 8 divisors (see below), whose sum is σ = 7824880800. Its totient is φ = 7616140224.

The previous prime is 7720312361. The next prime is 7720312393. The reversal of 7720312387 is 7832130277.

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-7720312387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7720312337) 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, 59728 + ... + 137869.

It is an arithmetic number, because the mean of its divisors is an integer number (978110100).

Almost surely, 2^7720312387 is an apocalyptic number.

7720312387 is a deficient number, since it is larger than the sum of its proper divisors (104568413).

7720312387 is a wasteful number, since it uses less digits than its factorization.

7720312387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198125.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 7720312387 is about 87865.3082109202. The cubic root of 7720312387 is about 1976.4156820629.

The spelling of 7720312387 in words is "seven billion, seven hundred twenty million, three hundred twelve thousand, three hundred eighty-seven".