597691 has 4 divisors (see below), whose sum is σ = 600552. Its totient is φ = 594832.

The previous prime is 597689. The next prime is 597697. The reversal of 597691 is 196795.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196795 = 5 ⋅39359.

It is a cyclic number.

It is not a de Polignac number, because 597691 - 2¹ = 597689 is a prime.

It is a Duffinian number.

597691 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 597691.

It is not an unprimeable number, because it can be changed into a prime (597697) 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, 1090 + ... + 1543.

It is an arithmetic number, because the mean of its divisors is an integer number (150138).

2⁵⁹⁷⁶⁹¹ is an apocalyptic number.

597691 is a deficient number, since it is larger than the sum of its proper divisors (2861).

597691 is a wasteful number, since it uses less digits than its factorization.

597691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860.

The product of its digits is 17010, while the sum is 37.

The square root of 597691 is about 773.1047794445. The cubic root of 597691 is about 84.2349337762.

It can be divided in two parts, 59 and 7691, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 597691 in words is "five hundred ninety-seven thousand, six hundred ninety-one".