933661 has 4 divisors (see below), whose sum is σ = 935712. Its totient is φ = 931612.

The previous prime is 933649. The next prime is 933671. The reversal of 933661 is 166339.

933661 is a nontrivial binomial coefficient, being equal to C(1367, 2).

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166339 = 181 ⋅919.

It is not a de Polignac number, because 933661 - 2¹³ = 925469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (933601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 1366.

It is an arithmetic number, because the mean of its divisors is an integer number (233928).

2⁹³³⁶⁶¹ is an apocalyptic number.

933661 is the 1366-th triangular number.

933661 is the 456-th centered nonagonal number.

It is an amenable number.

933661 is a deficient number, since it is larger than the sum of its proper divisors (2051).

933661 is a wasteful number, since it uses less digits than its factorization.

933661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its digits is 2916, while the sum is 28.

The square root of 933661 is about 966.2613518091. The cubic root of 933661 is about 97.7379155789.

It can be divided in two parts, 9 and 33661, that added together give a triangular number (33670 = T₂₅₉).

The spelling of 933661 in words is "nine hundred thirty-three thousand, six hundred sixty-one".