129798365 has 4 divisors (see below), whose sum is σ = 155758044. Its totient is φ = 103838688.

The previous prime is 129798359. The next prime is 129798371. The reversal of 129798365 is 563897921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 563897921 = 6011 ⋅93811.

It is an interprime number because it is at equal distance from previous prime (129798359) and next prime (129798371).

It can be written as a sum of positive squares in 2 ways, for example, as 17480761 + 112317604 = 4181^2 + 10598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129798365 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12979832 + ... + 12979841.

It is an arithmetic number, because the mean of its divisors is an integer number (38939511).

Almost surely, 2^129798365 is an apocalyptic number.

It is an amenable number.

129798365 is a deficient number, since it is larger than the sum of its proper divisors (25959679).

129798365 is an equidigital number, since it uses as much as digits as its factorization.

129798365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25959678.

The product of its digits is 816480, while the sum is 50.

The square root of 129798365 is about 11392.9085399647. The cubic root of 129798365 is about 506.3176581829.

The spelling of 129798365 in words is "one hundred twenty-nine million, seven hundred ninety-eight thousand, three hundred sixty-five".