690069 has 16 divisors (see below), whose sum is σ = 980352. Its totient is φ = 430848.

The previous prime is 690059. The next prime is 690073. The reversal of 690069 is 960096.

690069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 690069 - 2⁵ = 690037 is a prime.

It is a super-2 number, since 2×690069² = 952390449522, which contains 22 as substring.

690069 is a strobogrammatic number because it is the same when read upside-down.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690059) 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, 4969 + ... + 5105.

It is an arithmetic number, because the mean of its divisors is an integer number (61272).

2⁶⁹⁰⁰⁶⁹ is an apocalyptic number.

690069 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

690069 is a deficient number, since it is larger than the sum of its proper divisors (290283).

690069 is a wasteful number, since it uses less digits than its factorization.

690069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 690069 is about 830.7039183728. The cubic root of 690069 is about 88.3685046445.

It can be divided in two parts, 6900 and 69, that multiplied together give a square (476100 = 690²).

The spelling of 690069 in words is "six hundred ninety thousand, sixty-nine".