690928033 has 4 divisors (see below), whose sum is σ = 691030548. Its totient is φ = 690825520.

The previous prime is 690928019. The next prime is 690928039. The reversal of 690928033 is 330829096.

690928033 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 266897569 + 424030464 = 16337^2 + 20592^2 .

It is a cyclic number.

It is not a de Polignac number, because 690928033 - 2¹⁷ = 690796961 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690928039) 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, 40378 + ... + 54883.

It is an arithmetic number, because the mean of its divisors is an integer number (172757637).

Almost surely, 2^690928033 is an apocalyptic number.

It is an amenable number.

690928033 is a deficient number, since it is larger than the sum of its proper divisors (102515).

690928033 is an equidigital number, since it uses as much as digits as its factorization.

690928033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102514.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 690928033 is about 26285.5099436933. The cubic root of 690928033 is about 884.0515797623.

The spelling of 690928033 in words is "six hundred ninety million, nine hundred twenty-eight thousand, thirty-three".