100780829 has 8 divisors (see below), whose sum is σ = 106800120. Its totient is φ = 94931200.

The previous prime is 100780819. The next prime is 100780837. The reversal of 100780829 is 928087001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 240100 + 100540729 = 490^2 + 10027^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 100780829 - 2¹² = 100776733 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 (100780819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41192 + ... + 43569.

It is an arithmetic number, because the mean of its divisors is an integer number (13350015).

Almost surely, 2^100780829 is an apocalyptic number.

It is an amenable number.

100780829 is a deficient number, since it is larger than the sum of its proper divisors (6019291).

100780829 is an equidigital number, since it uses as much as digits as its factorization.

100780829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84831.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 100780829 is about 10038.9655343566. The cubic root of 100780829 is about 465.3638482660.

The spelling of 100780829 in words is "one hundred million, seven hundred eighty thousand, eight hundred twenty-nine".