693090 has 64 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 172800.

The previous prime is 693089. The next prime is 693097. The reversal of 693090 is 90396.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (693097) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4515 + ... + 4665.

It is an arithmetic number, because the mean of its divisors is an integer number (30780).

2⁶⁹³⁰⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 693090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (984960).

693090 is an abundant number, since it is smaller than the sum of its proper divisors (1276830).

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

693090 is a wasteful number, since it uses less digits than its factorization.

693090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 178 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 693090 is about 832.5202700235. The cubic root of 693090 is about 88.4972708150.

It can be divided in two parts, 6 and 93090, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 693090 in words is "six hundred ninety-three thousand, ninety".