680817451 has 2 divisors, whose sum is σ = 680817452. Its totient is φ = 680817450.

The previous prime is 680817433. The next prime is 680817463. The reversal of 680817451 is 154718086.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680817451 is a prime.

It is a super-2 number, since 2×680817451² = 927024803172274802, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (680817251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340408725 + 340408726.

It is an arithmetic number, because the mean of its divisors is an integer number (340408726).

Almost surely, 2^680817451 is an apocalyptic number.

680817451 is a deficient number, since it is larger than the sum of its proper divisors (1).

680817451 is an equidigital number, since it uses as much as digits as its factorization.

680817451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 680817451 is about 26092.4788205337. The cubic root of 680817451 is about 879.7181651708.

The spelling of 680817451 in words is "six hundred eighty million, eight hundred seventeen thousand, four hundred fifty-one".