673961 has 2 divisors, whose sum is σ = 673962. Its totient is φ = 673960.

The previous prime is 673951. The next prime is 673979. The reversal of 673961 is 169376.

673961 = 580² + 581².

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 337561 + 336400 = 581^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 673961 - 2¹⁰ = 672937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (673921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336980 + 336981.

It is an arithmetic number, because the mean of its divisors is an integer number (336981).

2⁶⁷³⁹⁶¹ is an apocalyptic number.

673961 is the 581-st centered square number.

It is an amenable number.

673961 is a deficient number, since it is larger than the sum of its proper divisors (1).

673961 is an equidigital number, since it uses as much as digits as its factorization.

673961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 32.

The square root of 673961 is about 820.9512774824. The cubic root of 673961 is about 87.6755008197.

The spelling of 673961 in words is "six hundred seventy-three thousand, nine hundred sixty-one".