690077 has 4 divisors (see below), whose sum is σ = 691740. Its totient is φ = 688416.

The previous prime is 690073. The next prime is 690089. The reversal of 690077 is 770096.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 306916 + 383161 = 554^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 690077 - 2² = 690073 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383 + ... + 1235.

It is an arithmetic number, because the mean of its divisors is an integer number (172935).

2⁶⁹⁰⁰⁷⁷ is an apocalyptic number.

It is an amenable number.

690077 is a deficient number, since it is larger than the sum of its proper divisors (1663).

690077 is an equidigital number, since it uses as much as digits as its factorization.

690077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 690077 is about 830.7087335523. The cubic root of 690077 is about 88.3688461298.

The spelling of 690077 in words is "six hundred ninety thousand, seventy-seven".