129249077693 has 4 divisors (see below), whose sum is σ = 129250420188. Its totient is φ = 129247735200.

The previous prime is 129249077677. The next prime is 129249077717. The reversal of 129249077693 is 396770942921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 396770942921 = 79 ⋅5022416999.

It can be written as a sum of positive squares in 2 ways, for example, as 101606025049 + 27643052644 = 318757^2 + 166262^2 .

It is a cyclic number.

It is not a de Polignac number, because 129249077693 - 2⁴ = 129249077677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129249077593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514658 + ... + 723443.

It is an arithmetic number, because the mean of its divisors is an integer number (32312605047).

Almost surely, 2^129249077693 is an apocalyptic number.

It is an amenable number.

129249077693 is a deficient number, since it is larger than the sum of its proper divisors (1342495).

129249077693 is a wasteful number, since it uses less digits than its factorization.

129249077693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342494.

The product of its (nonzero) digits is 10287648, while the sum is 59.

The spelling of 129249077693 in words is "one hundred twenty-nine billion, two hundred forty-nine million, seventy-seven thousand, six hundred ninety-three".