34393927921 has 2 divisors, whose sum is σ = 34393927922. Its totient is φ = 34393927920.

The previous prime is 34393927913. The next prime is 34393927937. The reversal of 34393927921 is 12972939343.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33562240000 + 831687921 = 183200^2 + 28839^2 .

It is a cyclic number.

It is not a de Polignac number, because 34393927921 - 2³ = 34393927913 is a prime.

It is not a weakly prime, because it can be changed into another prime (34393927951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17196963960 + 17196963961.

It is an arithmetic number, because the mean of its divisors is an integer number (17196963961).

Almost surely, 2^34393927921 is an apocalyptic number.

It is an amenable number.

34393927921 is a deficient number, since it is larger than the sum of its proper divisors (1).

34393927921 is an equidigital number, since it uses as much as digits as its factorization.

34393927921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2204496, while the sum is 52.

The spelling of 34393927921 in words is "thirty-four billion, three hundred ninety-three million, nine hundred twenty-seven thousand, nine hundred twenty-one".