693381 has 16 divisors (see below), whose sum is σ = 1040256. Its totient is φ = 407616.

The previous prime is 693373. The next prime is 693397. The reversal of 693381 is 183396.

693381 = T₄₅ + T₄₆ + ... + T₁₆₁.

It is not a de Polignac number, because 693381 - 2³ = 693373 is a prime.

It is a super-2 number, since 2×693381² = 961554422322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511 + ... + 1283.

It is an arithmetic number, because the mean of its divisors is an integer number (65016).

2⁶⁹³³⁸¹ is an apocalyptic number.

It is an amenable number.

693381 is a deficient number, since it is larger than the sum of its proper divisors (346875).

693381 is a wasteful number, since it uses less digits than its factorization.

693381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812.

The product of its digits is 3888, while the sum is 30.

The square root of 693381 is about 832.6950222020. The cubic root of 693381 is about 88.5096545374.

It can be divided in two parts, 69 and 3381, that multiplied together give a square (233289 = 483²).

The spelling of 693381 in words is "six hundred ninety-three thousand, three hundred eighty-one".