67540513 has 4 divisors (see below), whose sum is σ = 67567428. Its totient is φ = 67513600.

The previous prime is 67540483. The next prime is 67540519. The reversal of 67540513 is 31504576.

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 39841344 + 27699169 = 6312^2 + 5263^2 .

It is a cyclic number.

It is not a de Polignac number, because 67540513 - 2⁹ = 67540001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67540519) 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, 9256 + ... + 14857.

It is an arithmetic number, because the mean of its divisors is an integer number (16891857).

Almost surely, 2^67540513 is an apocalyptic number.

It is an amenable number.

67540513 is a deficient number, since it is larger than the sum of its proper divisors (26915).

67540513 is a wasteful number, since it uses less digits than its factorization.

67540513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26914.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 67540513 is about 8218.3035354019. The cubic root of 67540513 is about 407.2440848650.

The spelling of 67540513 in words is "sixty-seven million, five hundred forty thousand, five hundred thirteen".