780942101 has 4 divisors (see below), whose sum is σ = 791640012. Its totient is φ = 770244192.

The previous prime is 780942079. The next prime is 780942109. The reversal of 780942101 is 101249087.

780942101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101249087 = 5081 ⋅19927.

It can be written as a sum of positive squares in 2 ways, for example, as 351375025 + 429567076 = 18745^2 + 20726^2 .

It is a cyclic number.

It is not a de Polignac number, because 780942101 - 2¹⁸ = 780679957 is a prime.

It is a super-2 number, since 2×780942101² = 1219741130228588402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780942109) 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, 5348846 + ... + 5348991.

It is an arithmetic number, because the mean of its divisors is an integer number (197910003).

Almost surely, 2^780942101 is an apocalyptic number.

It is an amenable number.

780942101 is a deficient number, since it is larger than the sum of its proper divisors (10697911).

780942101 is a wasteful number, since it uses less digits than its factorization.

780942101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10697910.

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 780942101 is about 27945.3413112096. The cubic root of 780942101 is about 920.8868657362.

The spelling of 780942101 in words is "seven hundred eighty million, nine hundred forty-two thousand, one hundred one".