34207320721 has 4 divisors (see below), whose sum is σ = 39094080832. Its totient is φ = 29320560612.

The previous prime is 34207320703. The next prime is 34207320737. The reversal of 34207320721 is 12702370243.

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.

It is not a de Polignac number, because 34207320721 - 2¹⁷ = 34207189649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34207320701) 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, 2443380045 + ... + 2443380058.

It is an arithmetic number, because the mean of its divisors is an integer number (9773520208).

Almost surely, 2^34207320721 is an apocalyptic number.

It is an amenable number.

34207320721 is a deficient number, since it is larger than the sum of its proper divisors (4886760111).

34207320721 is an equidigital number, since it uses as much as digits as its factorization.

34207320721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886760110.

The product of its (nonzero) digits is 14112, while the sum is 31.

Adding to 34207320721 its reverse (12702370243), we get a palindrome (46909690964).

The spelling of 34207320721 in words is "thirty-four billion, two hundred seven million, three hundred twenty thousand, seven hundred twenty-one".