780378113 has 8 divisors (see below), whose sum is σ = 792585000. Its totient is φ = 768264448.

The previous prime is 780378041. The next prime is 780378121. The reversal of 780378113 is 311873087.

It can be written as a sum of positive squares in 4 ways, for example, as 78287104 + 702091009 = 8848^2 + 26497^2 .

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 780378113 - 2²⁸ = 511942657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (780378163) 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, 6338 + ... + 40011.

It is an arithmetic number, because the mean of its divisors is an integer number (99073125).

Almost surely, 2^780378113 is an apocalyptic number.

It is an amenable number.

780378113 is a deficient number, since it is larger than the sum of its proper divisors (12206887).

780378113 is a wasteful number, since it uses less digits than its factorization.

780378113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46611.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 780378113 is about 27935.2485759479. The cubic root of 780378113 is about 920.6651274798.

The spelling of 780378113 in words is "seven hundred eighty million, three hundred seventy-eight thousand, one hundred thirteen".