690761 has 8 divisors (see below), whose sum is σ = 738720. Its totient is φ = 643648.

The previous prime is 690757. The next prime is 690787. The reversal of 690761 is 167096.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690761 - 2² = 690757 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 690761.

It is not an unprimeable number, because it can be changed into a prime (690721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2930 + ... + 3156.

It is an arithmetic number, because the mean of its divisors is an integer number (92340).

2⁶⁹⁰⁷⁶¹ is an apocalyptic number.

It is an amenable number.

690761 is a deficient number, since it is larger than the sum of its proper divisors (47959).

690761 is a wasteful number, since it uses less digits than its factorization.

690761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 690761 is about 831.1203282317. The cubic root of 690761 is about 88.3980333708.

The spelling of 690761 in words is "six hundred ninety thousand, seven hundred sixty-one".