351187121 has 2 divisors, whose sum is σ = 351187122. Its totient is φ = 351187120.

The previous prime is 351187117. The next prime is 351187223. The reversal of 351187121 is 121781153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181171600 + 170015521 = 13460^2 + 13039^2 .

It is a cyclic number.

It is not a de Polignac number, because 351187121 - 2² = 351187117 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 (351187721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175593560 + 175593561.

It is an arithmetic number, because the mean of its divisors is an integer number (175593561).

Almost surely, 2^351187121 is an apocalyptic number.

It is an amenable number.

351187121 is a deficient number, since it is larger than the sum of its proper divisors (1).

351187121 is an equidigital number, since it uses as much as digits as its factorization.

351187121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 29.

The square root of 351187121 is about 18739.9872198462. The cubic root of 351187121 is about 705.5257356424.

The spelling of 351187121 in words is "three hundred fifty-one million, one hundred eighty-seven thousand, one hundred twenty-one".