129169701491 has 2 divisors, whose sum is σ = 129169701492. Its totient is φ = 129169701490.

The previous prime is 129169701431. The next prime is 129169701499. The reversal of 129169701491 is 194107961921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129169701491 - 2¹⁰ = 129169700467 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (129169701499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64584850745 + 64584850746.

It is an arithmetic number, because the mean of its divisors is an integer number (64584850746).

Almost surely, 2^129169701491 is an apocalyptic number.

129169701491 is a deficient number, since it is larger than the sum of its proper divisors (1).

129169701491 is an equidigital number, since it uses as much as digits as its factorization.

129169701491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 50.

The spelling of 129169701491 in words is "one hundred twenty-nine billion, one hundred sixty-nine million, seven hundred one thousand, four hundred ninety-one".