743881 has 2 divisors, whose sum is σ = 743882. Its totient is φ = 743880.

The previous prime is 743851. The next prime is 743891. The reversal of 743881 is 188347.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 46656 = 835^2 + 216^2 .

It is a cyclic number.

It is not a de Polignac number, because 743881 - 2⁵ = 743849 is a prime.

It is a super-2 number, since 2×743881² = 1106717884322, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (743851) 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 as a sum of consecutive naturals, namely, 371940 + 371941.

It is an arithmetic number, because the mean of its divisors is an integer number (371941).

2⁷⁴³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

743881 is a deficient number, since it is larger than the sum of its proper divisors (1).

743881 is an equidigital number, since it uses as much as digits as its factorization.

743881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 31.

The square root of 743881 is about 862.4853621946. The cubic root of 743881 is about 90.6082665894.

The spelling of 743881 in words is "seven hundred forty-three thousand, eight hundred eighty-one".