351146921 has 2 divisors, whose sum is σ = 351146922. Its totient is φ = 351146920.

The previous prime is 351146903. The next prime is 351146963. The reversal of 351146921 is 129641153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279558400 + 71588521 = 16720^2 + 8461^2 .

It is an emirp because it is prime and its reverse (129641153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 351146921 - 2¹⁴ = 351130537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (351146321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175573460 + 175573461.

It is an arithmetic number, because the mean of its divisors is an integer number (175573461).

Almost surely, 2^351146921 is an apocalyptic number.

It is an amenable number.

351146921 is a deficient number, since it is larger than the sum of its proper divisors (1).

351146921 is an equidigital number, since it uses as much as digits as its factorization.

351146921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 351146921 is about 18738.9146163805. The cubic root of 351146921 is about 705.4988143658.

The spelling of 351146921 in words is "three hundred fifty-one million, one hundred forty-six thousand, nine hundred twenty-one".