68742513 has 56 divisors (see below), whose sum is σ = 124164800. Its totient is φ = 37161504.

The previous prime is 68742473. The next prime is 68742517. The reversal of 68742513 is 31524786.

It is not a de Polignac number, because 68742513 - 2⁶ = 68742449 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68742517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 96603 + ... + 97311.

Almost surely, 2^68742513 is an apocalyptic number.

68742513 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

68742513 is a deficient number, since it is larger than the sum of its proper divisors (55422287).

68742513 is an equidigital number, since it uses as much as digits as its factorization.

68742513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753 (or 738 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 68742513 is about 8291.1104805086. The cubic root of 68742513 is about 409.6457638311.

The spelling of 68742513 in words is "sixty-eight million, seven hundred forty-two thousand, five hundred thirteen".