681458441 has 2 divisors, whose sum is σ = 681458442. Its totient is φ = 681458440.

The previous prime is 681458423. The next prime is 681458537. The reversal of 681458441 is 144854186.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 610831225 + 70627216 = 24715^2 + 8404^2 .

It is a cyclic number.

It is not a de Polignac number, because 681458441 - 2⁶ = 681458377 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (681458411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340729220 + 340729221.

It is an arithmetic number, because the mean of its divisors is an integer number (340729221).

Almost surely, 2^681458441 is an apocalyptic number.

It is an amenable number.

681458441 is a deficient number, since it is larger than the sum of its proper divisors (1).

681458441 is an equidigital number, since it uses as much as digits as its factorization.

681458441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122880, while the sum is 41.

The square root of 681458441 is about 26104.7589722640. The cubic root of 681458441 is about 879.9941636149.

The spelling of 681458441 in words is "six hundred eighty-one million, four hundred fifty-eight thousand, four hundred forty-one".