690005629 has 4 divisors (see below), whose sum is σ = 690085660. Its totient is φ = 689925600.

The previous prime is 690005623. The next prime is 690005633. The reversal of 690005629 is 926500096.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 610831225 + 79174404 = 24715^2 + 8898^2 .

It is a cyclic number.

It is not a de Polignac number, because 690005629 - 2³ = 690005621 is a prime.

It is a super-2 number, since 2×690005629² = 952215536103371282, 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 (690005621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25272 + ... + 44929.

It is an arithmetic number, because the mean of its divisors is an integer number (172521415).

Almost surely, 2^690005629 is an apocalyptic number.

It is an amenable number.

690005629 is a deficient number, since it is larger than the sum of its proper divisors (80031).

690005629 is an equidigital number, since it uses as much as digits as its factorization.

690005629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80030.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 690005629 is about 26267.9582190927. The cubic root of 690005629 is about 883.6579951794.

The spelling of 690005629 in words is "six hundred ninety million, five thousand, six hundred twenty-nine".