699961 has 2 divisors, whose sum is σ = 699962. Its totient is φ = 699960.

The previous prime is 699953. The next prime is 699967. The reversal of 699961 is 169996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609961 + 90000 = 781^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 699961 - 2³ = 699953 is a prime.

It is not a weakly prime, because it can be changed into another prime (699967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349980 + 349981.

It is an arithmetic number, because the mean of its divisors is an integer number (349981).

2⁶⁹⁹⁹⁶¹ is an apocalyptic number.

It is an amenable number.

699961 is a deficient number, since it is larger than the sum of its proper divisors (1).

699961 is an equidigital number, since it uses as much as digits as its factorization.

699961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 699961 is about 836.6367192516. The cubic root of 699961 is about 88.7887511791.

The spelling of 699961 in words is "six hundred ninety-nine thousand, nine hundred sixty-one".