690945001 has 4 divisors (see below), whose sum is σ = 720986112. Its totient is φ = 660903892.

The previous prime is 690944971. The next prime is 690945007. The reversal of 690945001 is 100549096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690945001 - 2¹³ = 690936809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690945007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15020521 + ... + 15020566.

It is an arithmetic number, because the mean of its divisors is an integer number (180246528).

Almost surely, 2^690945001 is an apocalyptic number.

It is an amenable number.

690945001 is a deficient number, since it is larger than the sum of its proper divisors (30041111).

690945001 is a wasteful number, since it uses less digits than its factorization.

690945001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30041110.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 690945001 is about 26285.8327050904. The cubic root of 690945001 is about 884.0588166301.

The spelling of 690945001 in words is "six hundred ninety million, nine hundred forty-five thousand, one".