690376 has 8 divisors (see below), whose sum is σ = 1294470. Its totient is φ = 345184.

The previous prime is 690367. The next prime is 690377. The reversal of 690376 is 673096.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 8100 = 826^2 + 90^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (690377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43141 + ... + 43156.

2⁶⁹⁰³⁷⁶ is an apocalyptic number.

690376 is the 526-th centered pentagonal number.

It is an amenable number.

690376 is a deficient number, since it is larger than the sum of its proper divisors (604094).

690376 is a wasteful number, since it uses less digits than its factorization.

690376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86303 (or 86299 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 690376 is about 830.8886808713. Note that the first 3 decimals coincide. The cubic root of 690376 is about 88.3816072515.

The spelling of 690376 in words is "six hundred ninety thousand, three hundred seventy-six".