31143123004789 has 2 divisors, whose sum is σ = 31143123004790. Its totient is φ = 31143123004788.

The previous prime is 31143123004787. The next prime is 31143123004853. The reversal of 31143123004789 is 98740032134113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16837768458225 + 14305354546564 = 4103385^2 + 3782242^2 .

It is a cyclic number.

It is not a de Polignac number, because 31143123004789 - 2¹ = 31143123004787 is a prime.

It is a super-2 number, since 2×31143123004789² (a number of 28 digits) contains 22 as substring.

Together with 31143123004787, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143123004787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571561502394 + 15571561502395.

It is an arithmetic number, because the mean of its divisors is an integer number (15571561502395).

Almost surely, 2^{31143123004789} is an apocalyptic number.

It is an amenable number.

31143123004789 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143123004789 is an equidigital number, since it uses as much as digits as its factorization.

31143123004789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 31143123004789 in words is "thirty-one trillion, one hundred forty-three billion, one hundred twenty-three million, four thousand, seven hundred eighty-nine".