733981 has 2 divisors, whose sum is σ = 733982. Its totient is φ = 733980.

The previous prime is 733973. The next prime is 733991. The reversal of 733981 is 189337.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549081 + 184900 = 741^2 + 430^2 .

It is an emirp because it is prime and its reverse (189337) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 733981 - 2³ = 733973 is a prime.

It is a super-2 number, since 2×733981² = 1077456216722, which contains 22 as substring.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (733921) 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, 366990 + 366991.

It is an arithmetic number, because the mean of its divisors is an integer number (366991).

2⁷³³⁹⁸¹ is an apocalyptic number.

It is an amenable number.

733981 is a deficient number, since it is larger than the sum of its proper divisors (1).

733981 is an equidigital number, since it uses as much as digits as its factorization.

733981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 733981 is about 856.7269109816. The cubic root of 733981 is about 90.2045143372.

Subtracting from 733981 its reverse (189337), we obtain a square (544644 = 738²).

The spelling of 733981 in words is "seven hundred thirty-three thousand, nine hundred eighty-one".