129230442387 has 16 divisors (see below), whose sum is σ = 191842450560. Its totient is φ = 85978153800.

The previous prime is 129230442377. The next prime is 129230442413. The reversal of 129230442387 is 783244032921.

129230442387 is a `hidden beast` number, since 12 + 92 + 30 + 442 + 3 + 87 = 666.

It is not a de Polignac number, because 129230442387 - 2⁷ = 129230442259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129230442337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4860789 + ... + 4887302.

It is an arithmetic number, because the mean of its divisors is an integer number (11990153160).

Almost surely, 2^129230442387 is an apocalyptic number.

129230442387 is a deficient number, since it is larger than the sum of its proper divisors (62612008173).

129230442387 is an equidigital number, since it uses as much as digits as its factorization.

129230442387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9748591 (or 9748585 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 129230442387 in words is "one hundred twenty-nine billion, two hundred thirty million, four hundred forty-two thousand, three hundred eighty-seven".