690039601 has 4 divisors (see below), whose sum is σ = 713834100. Its totient is φ = 666245104.

The previous prime is 690039599. The next prime is 690039611. The reversal of 690039601 is 106930096.

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 264030001 + 426009600 = 16249^2 + 20640^2 .

It is a cyclic number.

It is not a de Polignac number, because 690039601 - 2¹ = 690039599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690039611) 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, 11897206 + ... + 11897263.

It is an arithmetic number, because the mean of its divisors is an integer number (178458525).

Almost surely, 2^690039601 is an apocalyptic number.

It is an amenable number.

690039601 is a deficient number, since it is larger than the sum of its proper divisors (23794499).

690039601 is a wasteful number, since it uses less digits than its factorization.

690039601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23794498.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 690039601 is about 26268.6048544646. The cubic root of 690039601 is about 883.6724970595.

Adding to 690039601 its reverse (106930096), we get a palindrome (796969697).

The spelling of 690039601 in words is "six hundred ninety million, thirty-nine thousand, six hundred one".