7870430721 has 8 divisors (see below), whose sum is σ = 11111196384. Its totient is φ = 4938309440.

The previous prime is 7870430719. The next prime is 7870430723. The reversal of 7870430721 is 1270340787.

It is an interprime number because it is at equal distance from previous prime (7870430719) and next prime (7870430723).

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

It is a cyclic number.

It is not a de Polignac number, because 7870430721 - 2¹ = 7870430719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7870430721.

It is not an unprimeable number, because it can be changed into a prime (7870430723) 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, 77161035 + ... + 77161136.

It is an arithmetic number, because the mean of its divisors is an integer number (1388899548).

Almost surely, 2^7870430721 is an apocalyptic number.

It is an amenable number.

7870430721 is a deficient number, since it is larger than the sum of its proper divisors (3240765663).

7870430721 is a wasteful number, since it uses less digits than its factorization.

7870430721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154322191.

The product of its (nonzero) digits is 65856, while the sum is 39.

The square root of 7870430721 is about 88715.4480403498. The cubic root of 7870430721 is about 1989.1437374907.

The spelling of 7870430721 in words is "seven billion, eight hundred seventy million, four hundred thirty thousand, seven hundred twenty-one".