699641 has 2 divisors, whose sum is σ = 699642. Its totient is φ = 699640.

The previous prime is 699631. The next prime is 699649. The reversal of 699641 is 146996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674041 + 25600 = 821^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 699641 - 2¹⁴ = 683257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (699649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349820 + 349821.

It is an arithmetic number, because the mean of its divisors is an integer number (349821).

2⁶⁹⁹⁶⁴¹ is an apocalyptic number.

It is an amenable number.

699641 is a deficient number, since it is larger than the sum of its proper divisors (1).

699641 is an equidigital number, since it uses as much as digits as its factorization.

699641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 699641 is about 836.4454554841. The cubic root of 699641 is about 88.7752186483.

The spelling of 699641 in words is "six hundred ninety-nine thousand, six hundred forty-one".