693690 has 32 divisors (see below), whose sum is σ = 1753920. Its totient is φ = 175104.

The previous prime is 693689. The next prime is 693691. The reversal of 693690 is 96396.

It is an interprime number because it is at equal distance from previous prime (693689) and next prime (693691).

It is a super-2 number, since 2×693690² = 962411632200, which contains 22 as substring.

It is an Ulam number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (693691) 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 in 15 ways as a sum of consecutive naturals, for example, 39 + ... + 1178.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2⁶⁹³⁶⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 693690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (876960).

693690 is an abundant number, since it is smaller than the sum of its proper divisors (1060230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

693690 is a wasteful number, since it uses less digits than its factorization.

693690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 693690 is about 832.8805436556. The cubic root of 693690 is about 88.5228004709.

The spelling of 693690 in words is "six hundred ninety-three thousand, six hundred ninety".