690506811 has 12 divisors (see below), whose sum is σ = 999049792. Its totient is φ = 459575856.

The previous prime is 690506809. The next prime is 690506893. The reversal of 690506811 is 118605096.

It is not a de Polignac number, because 690506811 - 2¹ = 690506809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690506711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57736 + ... + 68661.

Almost surely, 2^690506811 is an apocalyptic number.

690506811 is a deficient number, since it is larger than the sum of its proper divisors (308542981).

690506811 is a wasteful number, since it uses less digits than its factorization.

690506811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127010 (or 127007 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 690506811 is about 26277.4962848442. The cubic root of 690506811 is about 883.8718901969.

The spelling of 690506811 in words is "six hundred ninety million, five hundred six thousand, eight hundred eleven".