693409 has 2 divisors, whose sum is σ = 693410. Its totient is φ = 693408.

The previous prime is 693403. The next prime is 693421. The reversal of 693409 is 904396.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555025 + 138384 = 745^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 693409 - 2³ = 693401 is a prime.

It is not a weakly prime, because it can be changed into another prime (693401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 346704 + 346705.

It is an arithmetic number, because the mean of its divisors is an integer number (346705).

2⁶⁹³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

693409 is a deficient number, since it is larger than the sum of its proper divisors (1).

693409 is an equidigital number, since it uses as much as digits as its factorization.

693409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 693409 is about 832.7118349105. The cubic root of 693409 is about 88.5108459156.

The spelling of 693409 in words is "six hundred ninety-three thousand, four hundred nine".