31354126129 has 2 divisors, whose sum is σ = 31354126130. Its totient is φ = 31354126128.

The previous prime is 31354126109. The next prime is 31354126183. The reversal of 31354126129 is 92162145313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29685567025 + 1668559104 = 172295^2 + 40848^2 .

It is a cyclic number.

It is not a de Polignac number, because 31354126129 - 2²⁵ = 31320571697 is a prime.

It is not a weakly prime, because it can be changed into another prime (31354126109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677063064 + 15677063065.

It is an arithmetic number, because the mean of its divisors is an integer number (15677063065).

Almost surely, 2^31354126129 is an apocalyptic number.

It is an amenable number.

31354126129 is a deficient number, since it is larger than the sum of its proper divisors (1).

31354126129 is an equidigital number, since it uses as much as digits as its factorization.

31354126129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The spelling of 31354126129 in words is "thirty-one billion, three hundred fifty-four million, one hundred twenty-six thousand, one hundred twenty-nine".