690716069 has 6 divisors (see below), whose sum is σ = 733736754. Its totient is φ = 650085440.

The previous prime is 690716041. The next prime is 690716077. The reversal of 690716069 is 960617096.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 262764100 + 427951969 = 16210^2 + 20687^2 .

It is not a de Polignac number, because 690716069 - 2⁸ = 690715813 is a prime.

It is a super-2 number, since 2×690716069² = 954177375949625522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690716029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1194722 + ... + 1195299.

It is an arithmetic number, because the mean of its divisors is an integer number (122289459).

Almost surely, 2^690716069 is an apocalyptic number.

It is an amenable number.

690716069 is a deficient number, since it is larger than the sum of its proper divisors (43020685).

690716069 is a wasteful number, since it uses less digits than its factorization.

690716069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390055 (or 2390038 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 690716069 is about 26281.4776791565. The cubic root of 690716069 is about 883.9611669332.

The spelling of 690716069 in words is "six hundred ninety million, seven hundred sixteen thousand, sixty-nine".