351623404109 has 2 divisors, whose sum is σ = 351623404110. Its totient is φ = 351623404108.

The previous prime is 351623404091. The next prime is 351623404123. The reversal of 351623404109 is 901404326153.

Together with previous prime (351623404091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198020550025 + 153602854084 = 444995^2 + 391922^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-351623404109 is a prime.

It is a super-2 number, since 2×351623404109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351623404309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175811702054 + 175811702055.

It is an arithmetic number, because the mean of its divisors is an integer number (175811702055).

Almost surely, 2^351623404109 is an apocalyptic number.

It is an amenable number.

351623404109 is a deficient number, since it is larger than the sum of its proper divisors (1).

351623404109 is an equidigital number, since it uses as much as digits as its factorization.

351623404109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 38.

The spelling of 351623404109 in words is "three hundred fifty-one billion, six hundred twenty-three million, four hundred four thousand, one hundred nine".