346996621 has 2 divisors, whose sum is σ = 346996622. Its totient is φ = 346996620.

The previous prime is 346996589. The next prime is 346996631. The reversal of 346996621 is 126699643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335402596 + 11594025 = 18314^2 + 3405^2 .

It is a cyclic number.

It is not a de Polignac number, because 346996621 - 2⁵ = 346996589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346996631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173498310 + 173498311.

It is an arithmetic number, because the mean of its divisors is an integer number (173498311).

Almost surely, 2^346996621 is an apocalyptic number.

It is an amenable number.

346996621 is a deficient number, since it is larger than the sum of its proper divisors (1).

346996621 is an equidigital number, since it uses as much as digits as its factorization.

346996621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The square root of 346996621 is about 18627.8453128643. The cubic root of 346996621 is about 702.7082978859.

The spelling of 346996621 in words is "three hundred forty-six million, nine hundred ninety-six thousand, six hundred twenty-one".