351625661 has 2 divisors, whose sum is σ = 351625662. Its totient is φ = 351625660.

The previous prime is 351625543. The next prime is 351625669. The reversal of 351625661 is 166526153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226051225 + 125574436 = 15035^2 + 11206^2 .

It is an emirp because it is prime and its reverse (166526153) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 351625661 - 2¹⁴ = 351609277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351625669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175812830 + 175812831.

It is an arithmetic number, because the mean of its divisors is an integer number (175812831).

Almost surely, 2^351625661 is an apocalyptic number.

It is an amenable number.

351625661 is a deficient number, since it is larger than the sum of its proper divisors (1).

351625661 is an equidigital number, since it uses as much as digits as its factorization.

351625661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 35.

The square root of 351625661 is about 18751.6842176910. The cubic root of 351625661 is about 705.8192852821.

The spelling of 351625661 in words is "three hundred fifty-one million, six hundred twenty-five thousand, six hundred sixty-one".