129749043 has 32 divisors (see below), whose sum is σ = 190167040. Its totient is φ = 78382080.

The previous prime is 129749029. The next prime is 129749057. The reversal of 129749043 is 340947921.

It is an interprime number because it is at equal distance from previous prime (129749029) and next prime (129749057).

It is not a de Polignac number, because 129749043 - 2¹⁸ = 129486899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129748992 and 129749010.

It is not an unprimeable number, because it can be changed into a prime (129749143) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 171021 + ... + 171777.

It is an arithmetic number, because the mean of its divisors is an integer number (5942720).

Almost surely, 2^129749043 is an apocalyptic number.

129749043 is a deficient number, since it is larger than the sum of its proper divisors (60417997).

129749043 is a wasteful number, since it uses less digits than its factorization.

129749043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 129749043 is about 11390.7437421794. The cubic root of 129749043 is about 506.2535182807.

The spelling of 129749043 in words is "one hundred twenty-nine million, seven hundred forty-nine thousand, forty-three".