351666901 has 2 divisors, whose sum is σ = 351666902. Its totient is φ = 351666900.

The previous prime is 351666859. The next prime is 351666911. The reversal of 351666901 is 109666153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192932100 + 158734801 = 13890^2 + 12599^2 .

It is an emirp because it is prime and its reverse (109666153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 351666901 - 2¹¹ = 351664853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351666911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175833450 + 175833451.

It is an arithmetic number, because the mean of its divisors is an integer number (175833451).

Almost surely, 2^351666901 is an apocalyptic number.

It is an amenable number.

351666901 is a deficient number, since it is larger than the sum of its proper divisors (1).

351666901 is an equidigital number, since it uses as much as digits as its factorization.

351666901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 351666901 is about 18752.7838200092. The cubic root of 351666901 is about 705.8468779303.

It can be divided in two parts, 35166690 and 1, that added together give a triangular number (35166691 = T₈₃₈₆).

The spelling of 351666901 in words is "three hundred fifty-one million, six hundred sixty-six thousand, nine hundred one".