537296981 has 8 divisors (see below), whose sum is σ = 579120024. Its totient is φ = 495544320.

The previous prime is 537296959. The next prime is 537296993. The reversal of 537296981 is 189692735.

537296981 = 16390² + 16391².

It can be written as a sum of positive squares in 4 ways, for example, as 14945956 + 522351025 = 3866^2 + 22855^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537296981 is a prime.

It is a super-3 number, since 3×537296981³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (537226981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1160 + ... + 32801.

It is an arithmetic number, because the mean of its divisors is an integer number (72390003).

Almost surely, 2^537296981 is an apocalyptic number.

537296981 is the 16391-st centered square number.

It is an amenable number.

537296981 is a deficient number, since it is larger than the sum of its proper divisors (41823043).

537296981 is a wasteful number, since it uses less digits than its factorization.

537296981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35191.

The product of its digits is 816480, while the sum is 50.

The square root of 537296981 is about 23179.6674048615. The cubic root of 537296981 is about 812.9642852080.

The spelling of 537296981 in words is "five hundred thirty-seven million, two hundred ninety-six thousand, nine hundred eighty-one".