698641 has 2 divisors, whose sum is σ = 698642. Its totient is φ = 698640.

The previous prime is 698591. The next prime is 698653. The reversal of 698641 is 146896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633616 + 65025 = 796^2 + 255^2 .

It is a cyclic number.

It is not a de Polignac number, because 698641 - 2¹³ = 690449 is a prime.

698641 is a lucky number.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 698597 and 698606.

It is not a weakly prime, because it can be changed into another prime (692641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349320 + 349321.

It is an arithmetic number, because the mean of its divisors is an integer number (349321).

2⁶⁹⁸⁶⁴¹ is an apocalyptic number.

It is an amenable number.

698641 is a deficient number, since it is larger than the sum of its proper divisors (1).

698641 is an equidigital number, since it uses as much as digits as its factorization.

698641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 698641 is about 835.8474741243. The cubic root of 698641 is about 88.7329028760.

The spelling of 698641 in words is "six hundred ninety-eight thousand, six hundred forty-one".