511397 has 4 divisors (see below), whose sum is σ = 521100. Its totient is φ = 501696.

The previous prime is 511391. The next prime is 511409. The reversal of 511397 is 793115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 198916 + 312481 = 446^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 511397 - 2⁶ = 511333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 511397.

It is not an unprimeable number, because it can be changed into a prime (511391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4772 + ... + 4877.

It is an arithmetic number, because the mean of its divisors is an integer number (130275).

2⁵¹¹³⁹⁷ is an apocalyptic number.

It is an amenable number.

511397 is a deficient number, since it is larger than the sum of its proper divisors (9703).

511397 is an equidigital number, since it uses as much as digits as its factorization.

511397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9702.

The product of its digits is 945, while the sum is 26.

The square root of 511397 is about 715.1202696051. The cubic root of 511397 is about 79.9685814125.

The spelling of 511397 in words is "five hundred eleven thousand, three hundred ninety-seven".