34403401621 has 2 divisors, whose sum is σ = 34403401622. Its totient is φ = 34403401620.

The previous prime is 34403401609. The next prime is 34403401649. The reversal of 34403401621 is 12610430443.

It is an a-pointer prime, because the next prime (34403401649) can be obtained adding 34403401621 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27452844721 + 6950556900 = 165689^2 + 83370^2 .

It is a cyclic number.

It is not a de Polignac number, because 34403401621 - 2³⁵ = 43663253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 34403401621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34403401121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17201700810 + 17201700811.

It is an arithmetic number, because the mean of its divisors is an integer number (17201700811).

Almost surely, 2^34403401621 is an apocalyptic number.

It is an amenable number.

34403401621 is a deficient number, since it is larger than the sum of its proper divisors (1).

34403401621 is an equidigital number, since it uses as much as digits as its factorization.

34403401621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 34403401621 in words is "thirty-four billion, four hundred three million, four hundred one thousand, six hundred twenty-one".