743686 has 4 divisors (see below), whose sum is σ = 1115532. Its totient is φ = 371842.

The previous prime is 743671. The next prime is 743689. The reversal of 743686 is 686347.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686347 = 59 ⋅11633.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743689) by changing a digit.

743686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185920 + ... + 185923.

It is an arithmetic number, because the mean of its divisors is an integer number (278883).

2⁷⁴³⁶⁸⁶ is an apocalyptic number.

743686 is a deficient number, since it is larger than the sum of its proper divisors (371846).

743686 is a wasteful number, since it uses less digits than its factorization.

743686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371845.

The product of its digits is 24192, while the sum is 34.

The square root of 743686 is about 862.3723093885. The cubic root of 743686 is about 90.6003485864.

The spelling of 743686 in words is "seven hundred forty-three thousand, six hundred eighty-six".