690525069 has 8 divisors (see below), whose sum is σ = 991523232. Its totient is φ = 424938480.

The previous prime is 690525053. The next prime is 690525079. The reversal of 690525069 is 960525096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690525069 - 2⁴ = 690525053 is a prime.

It is a super-2 number, since 2×690525069² = 953649741834909522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 690525069.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690525019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8852847 + ... + 8852924.

It is an arithmetic number, because the mean of its divisors is an integer number (123940404).

Almost surely, 2^690525069 is an apocalyptic number.

It is an amenable number.

690525069 is a deficient number, since it is larger than the sum of its proper divisors (300998163).

690525069 is a wasteful number, since it uses less digits than its factorization.

690525069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17705787.

The product of its (nonzero) digits is 145800, while the sum is 42.

The square root of 690525069 is about 26277.8436900747. The cubic root of 690525069 is about 883.8796804125.

The spelling of 690525069 in words is "six hundred ninety million, five hundred twenty-five thousand, sixty-nine".