761609 has 4 divisors (see below), whose sum is σ = 772116. Its totient is φ = 751104.

The previous prime is 761603. The next prime is 761611. The reversal of 761609 is 906167.

It is a happy number.

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 462400 + 299209 = 680^2 + 547^2 .

It is a cyclic number.

It is not a de Polignac number, because 761609 - 2¹² = 757513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (761603) 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, 5144 + ... + 5289.

It is an arithmetic number, because the mean of its divisors is an integer number (193029).

2⁷⁶¹⁶⁰⁹ is an apocalyptic number.

It is an amenable number.

761609 is a deficient number, since it is larger than the sum of its proper divisors (10507).

761609 is a wasteful number, since it uses less digits than its factorization.

761609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10506.

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

The square root of 761609 is about 872.7021255847. The cubic root of 761609 is about 91.3224082811.

It can be divided in two parts, 7 and 61609, that added together give a palindrome (61616).

The spelling of 761609 in words is "seven hundred sixty-one thousand, six hundred nine".