34405661 has 2 divisors, whose sum is σ = 34405662. Its totient is φ = 34405660.

The previous prime is 34405649. The next prime is 34405663. The reversal of 34405661 is 16650443.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29539225 + 4866436 = 5435^2 + 2206^2 .

It is an emirp because it is prime and its reverse (16650443) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34405661 - 2¹⁸ = 34143517 is a prime.

Together with 34405663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34405663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17202830 + 17202831.

It is an arithmetic number, because the mean of its divisors is an integer number (17202831).

Almost surely, 2^34405661 is an apocalyptic number.

It is an amenable number.

34405661 is a deficient number, since it is larger than the sum of its proper divisors (1).

34405661 is an equidigital number, since it uses as much as digits as its factorization.

34405661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 34405661 is about 5865.6338958377. The cubic root of 34405661 is about 325.2445055526.

The spelling of 34405661 in words is "thirty-four million, four hundred five thousand, six hundred sixty-one".