10129999 has 6 divisors (see below), whose sum is σ = 11134760. Its totient is φ = 9208980.

The previous prime is 10129979. The next prime is 10130009. The reversal of 10129999 is 99992101.

10129999 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10129999 - 2⁷ = 10129871 is a prime.

It is a Duffinian number.

10129999 is a modest number, since divided by 9999 gives 1012 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10129919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41739 + ... + 41980.

Almost surely, 2^10129999 is an apocalyptic number.

10129999 is a deficient number, since it is larger than the sum of its proper divisors (1004761).

10129999 is an equidigital number, since it uses as much as digits as its factorization.

10129999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83741 (or 83730 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 10129999 is about 3182.7659354718. The cubic root of 10129999 is about 216.3730336664.

It can be divided in two parts, 1012 and 9999, that added together give a palindrome (11011).

The spelling of 10129999 in words is "ten million, one hundred twenty-nine thousand, nine hundred ninety-nine".