531777893 has 2 divisors, whose sum is σ = 531777894. Its totient is φ = 531777892.

The previous prime is 531777889. The next prime is 531777919. The reversal of 531777893 is 398777135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323928004 + 207849889 = 17998^2 + 14417^2 .

It is a cyclic number.

It is not a de Polignac number, because 531777893 - 2² = 531777889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531777803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265888946 + 265888947.

It is an arithmetic number, because the mean of its divisors is an integer number (265888947).

Almost surely, 2^531777893 is an apocalyptic number.

It is an amenable number.

531777893 is a deficient number, since it is larger than the sum of its proper divisors (1).

531777893 is an equidigital number, since it uses as much as digits as its factorization.

531777893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1111320, while the sum is 50.

The square root of 531777893 is about 23060.3099068508. The cubic root of 531777893 is about 810.1711232215.

The spelling of 531777893 in words is "five hundred thirty-one million, seven hundred seventy-seven thousand, eight hundred ninety-three".