129462779 has 2 divisors, whose sum is σ = 129462780. Its totient is φ = 129462778.

The previous prime is 129462761. The next prime is 129462797. The reversal of 129462779 is 977264921.

Together with next prime (129462797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (129462761) and next prime (129462797).

It is a cyclic number.

It is not a de Polignac number, because 129462779 - 2¹² = 129458683 is a prime.

It is a super-2 number, since 2×129462779² = 33521222292805682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129462079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64731389 + 64731390.

It is an arithmetic number, because the mean of its divisors is an integer number (64731390).

Almost surely, 2^129462779 is an apocalyptic number.

129462779 is a deficient number, since it is larger than the sum of its proper divisors (1).

129462779 is an equidigital number, since it uses as much as digits as its factorization.

129462779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 129462779 is about 11378.1711623617. The cubic root of 129462779 is about 505.8809301297.

The spelling of 129462779 in words is "one hundred twenty-nine million, four hundred sixty-two thousand, seven hundred seventy-nine".