531197797 has 8 divisors (see below), whose sum is σ = 574189560. Its totient is φ = 488510400.

The previous prime is 531197773. The next prime is 531197867. The reversal of 531197797 is 797791135.

It can be written as a sum of positive squares in 4 ways, for example, as 69205761 + 461992036 = 8319^2 + 21494^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 531197797 - 2¹⁹ = 530673509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 531197797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531197707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72454 + ... + 79447.

It is an arithmetic number, because the mean of its divisors is an integer number (71773695).

Almost surely, 2^531197797 is an apocalyptic number.

It is an amenable number.

531197797 is a deficient number, since it is larger than the sum of its proper divisors (42991763).

531197797 is a wasteful number, since it uses less digits than its factorization.

531197797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152183.

The product of its digits is 416745, while the sum is 49.

The square root of 531197797 is about 23047.7286733422. The cubic root of 531197797 is about 809.8764212222.

The spelling of 531197797 in words is "five hundred thirty-one million, one hundred ninety-seven thousand, seven hundred ninety-seven".