8720746349 has 4 divisors (see below), whose sum is σ = 9966567264. Its totient is φ = 7474925436.

The previous prime is 8720746313. The next prime is 8720746361. The reversal of 8720746349 is 9436470278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9436470278 = 2 ⋅4718235139.

It is a cyclic number.

It is not a de Polignac number, because 8720746349 - 2⁸ = 8720746093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8720746297 and 8720746306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720746249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622910447 + ... + 622910460.

It is an arithmetic number, because the mean of its divisors is an integer number (2491641816).

Almost surely, 2^8720746349 is an apocalyptic number.

It is an amenable number.

8720746349 is a deficient number, since it is larger than the sum of its proper divisors (1245820915).

8720746349 is a wasteful number, since it uses less digits than its factorization.

8720746349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1245820914.

The product of its (nonzero) digits is 2032128, while the sum is 50.

The square root of 8720746349 is about 93384.9364137493. The cubic root of 8720746349 is about 2058.3436546673.

The spelling of 8720746349 in words is "eight billion, seven hundred twenty million, seven hundred forty-six thousand, three hundred forty-nine".