681465401 has 2 divisors, whose sum is σ = 681465402. Its totient is φ = 681465400.

The previous prime is 681465397. The next prime is 681465409. The reversal of 681465401 is 104564186.

681465401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 518928400 + 162537001 = 22780^2 + 12749^2 .

It is a cyclic number.

It is not a de Polignac number, because 681465401 - 2² = 681465397 is a prime.

It is not a weakly prime, because it can be changed into another prime (681465409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340732700 + 340732701.

It is an arithmetic number, because the mean of its divisors is an integer number (340732701).

Almost surely, 2^681465401 is an apocalyptic number.

It is an amenable number.

681465401 is a deficient number, since it is larger than the sum of its proper divisors (1).

681465401 is an equidigital number, since it uses as much as digits as its factorization.

681465401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 681465401 is about 26104.8922809499. The cubic root of 681465401 is about 879.9971595122.

The spelling of 681465401 in words is "six hundred eighty-one million, four hundred sixty-five thousand, four hundred one".