68408613 has 48 divisors (see below), whose sum is σ = 122967936. Its totient is φ = 35683200.

The previous prime is 68408611. The next prime is 68408617. The reversal of 68408613 is 31680486.

It is a happy number.

It is not a de Polignac number, because 68408613 - 2¹ = 68408611 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68408611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82306 + ... + 83132.

It is an arithmetic number, because the mean of its divisors is an integer number (2561832).

Almost surely, 2^68408613 is an apocalyptic number.

68408613 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

68408613 is a deficient number, since it is larger than the sum of its proper divisors (54559323).

68408613 is a wasteful number, since it uses less digits than its factorization.

68408613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 68408613 is about 8270.9499454416. The cubic root of 68408613 is about 408.9814355827.

The spelling of 68408613 in words is "sixty-eight million, four hundred eight thousand, six hundred thirteen".