68800513 has 4 divisors (see below), whose sum is σ = 72847620. Its totient is φ = 64753408.

The previous prime is 68800489. The next prime is 68800553. The reversal of 68800513 is 31500886.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31500886 = 2 ⋅15750443.

It can be written as a sum of positive squares in 2 ways, for example, as 60575089 + 8225424 = 7783^2 + 2868^2 .

It is not a de Polignac number, because 68800513 - 2⁵ = 68800481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68800553) 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, 2023528 + ... + 2023561.

It is an arithmetic number, because the mean of its divisors is an integer number (18211905).

Almost surely, 2^68800513 is an apocalyptic number.

It is an amenable number.

68800513 is a deficient number, since it is larger than the sum of its proper divisors (4047107).

68800513 is a wasteful number, since it uses less digits than its factorization.

68800513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4047106.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 68800513 is about 8294.6074650944. The cubic root of 68800513 is about 409.7609413451.

It can be divided in two parts, 68 and 800513, that multiplied together give a square (54434884 = 7378²).

The spelling of 68800513 in words is "sixty-eight million, eight hundred thousand, five hundred thirteen".