610691 has 4 divisors (see below), whose sum is σ = 646632. Its totient is φ = 574752.

The previous prime is 610681. The next prime is 610699. The reversal of 610691 is 196016.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 610691 - 2¹⁸ = 348547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 610691.

It is not an unprimeable number, because it can be changed into a prime (610699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17945 + ... + 17978.

It is an arithmetic number, because the mean of its divisors is an integer number (161658).

2⁶¹⁰⁶⁹¹ is an apocalyptic number.

610691 is a deficient number, since it is larger than the sum of its proper divisors (35941).

610691 is a wasteful number, since it uses less digits than its factorization.

610691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35940.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 610691 is about 781.4672098047. The cubic root of 610691 is about 84.8412724067.

It can be divided in two parts, 6 and 10691, that multiplied together give a palindrome (64146).

The spelling of 610691 in words is "six hundred ten thousand, six hundred ninety-one".