351634321 has 2 divisors, whose sum is σ = 351634322. Its totient is φ = 351634320.

The previous prime is 351634319. The next prime is 351634337. The reversal of 351634321 is 123436153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 294465600 + 57168721 = 17160^2 + 7561^2 .

It is an emirp because it is prime and its reverse (123436153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 351634321 - 2¹ = 351634319 is a prime.

Together with 351634319, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 351634321.

It is not a weakly prime, because it can be changed into another prime (351634301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175817160 + 175817161.

It is an arithmetic number, because the mean of its divisors is an integer number (175817161).

Almost surely, 2^351634321 is an apocalyptic number.

It is an amenable number.

351634321 is a deficient number, since it is larger than the sum of its proper divisors (1).

351634321 is an equidigital number, since it uses as much as digits as its factorization.

351634321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 28.

The square root of 351634321 is about 18751.9151288608. The cubic root of 351634321 is about 705.8250796496.

The spelling of 351634321 in words is "three hundred fifty-one million, six hundred thirty-four thousand, three hundred twenty-one".