351681263939 has 2 divisors, whose sum is σ = 351681263940. Its totient is φ = 351681263938.

The previous prime is 351681263867. The next prime is 351681263981. The reversal of 351681263939 is 939362186153.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 351681263939 - 2²⁰ = 351680215363 is a prime.

It is a super-2 number, since 2×351681263939² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (351681263539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175840631969 + 175840631970.

It is an arithmetic number, because the mean of its divisors is an integer number (175840631970).

Almost surely, 2^351681263939 is an apocalyptic number.

351681263939 is a deficient number, since it is larger than the sum of its proper divisors (1).

351681263939 is an equidigital number, since it uses as much as digits as its factorization.

351681263939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6298560, while the sum is 56.

The spelling of 351681263939 in words is "three hundred fifty-one billion, six hundred eighty-one million, two hundred sixty-three thousand, nine hundred thirty-nine".