7620479987 has 2 divisors, whose sum is σ = 7620479988. Its totient is φ = 7620479986.

The previous prime is 7620479947. The next prime is 7620480041. The reversal of 7620479987 is 7899740267.

7620479987 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is an emirp because it is prime and its reverse (7899740267) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7620479987 - 2²⁰ = 7619431411 is a prime.

It is not a weakly prime, because it can be changed into another prime (7620479947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3810239993 + 3810239994.

It is an arithmetic number, because the mean of its divisors is an integer number (3810239994).

Almost surely, 2^7620479987 is an apocalyptic number.

7620479987 is a deficient number, since it is larger than the sum of its proper divisors (1).

7620479987 is an equidigital number, since it uses as much as digits as its factorization.

7620479987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 59.

The square root of 7620479987 is about 87295.3606270116. The cubic root of 7620479987 is about 1967.8595962411.

The spelling of 7620479987 in words is "seven billion, six hundred twenty million, four hundred seventy-nine thousand, nine hundred eighty-seven".