682778401 has 4 divisors (see below), whose sum is σ = 683072404. Its totient is φ = 682484400.

The previous prime is 682778351. The next prime is 682778461. The reversal of 682778401 is 104877286.

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 252174400 + 430604001 = 15880^2 + 20751^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-682778401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (682778461) 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, 143490 + ... + 148171.

It is an arithmetic number, because the mean of its divisors is an integer number (170768101).

Almost surely, 2^682778401 is an apocalyptic number.

It is an amenable number.

682778401 is a deficient number, since it is larger than the sum of its proper divisors (294003).

682778401 is a wasteful number, since it uses less digits than its factorization.

682778401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294002.

The product of its (nonzero) digits is 150528, while the sum is 43.

The square root of 682778401 is about 26130.0287217600. The cubic root of 682778401 is about 880.5619693033.

The spelling of 682778401 in words is "six hundred eighty-two million, seven hundred seventy-eight thousand, four hundred one".