232780129 has 4 divisors (see below), whose sum is σ = 240807060. Its totient is φ = 224753200.

The previous prime is 232780091. The next prime is 232780151. The reversal of 232780129 is 921087232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 137522529 + 95257600 = 11727^2 + 9760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232780129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 232780094 and 232780103.

It is not an unprimeable number, because it can be changed into a prime (232780169) 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, 4013422 + ... + 4013479.

It is an arithmetic number, because the mean of its divisors is an integer number (60201765).

Almost surely, 2^232780129 is an apocalyptic number.

232780129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

232780129 is a deficient number, since it is larger than the sum of its proper divisors (8026931).

232780129 is an equidigital number, since it uses as much as digits as its factorization.

232780129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026930.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 232780129 is about 15257.1337085312. The cubic root of 232780129 is about 615.1513312128.

The spelling of 232780129 in words is "two hundred thirty-two million, seven hundred eighty thousand, one hundred twenty-nine".