68609905 has 16 divisors (see below), whose sum is σ = 101332224. Its totient is φ = 43427520.

The previous prime is 68609899. The next prime is 68609921. The reversal of 68609905 is 50990686.

It is not a de Polignac number, because 68609905 - 2¹⁹ = 68085617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74941 + ... + 75850.

It is an arithmetic number, because the mean of its divisors is an integer number (6333264).

Almost surely, 2^68609905 is an apocalyptic number.

68609905 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68609905 is a deficient number, since it is larger than the sum of its proper divisors (32722319).

68609905 is a wasteful number, since it uses less digits than its factorization.

68609905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150816.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 68609905 is about 8283.1096213922. The cubic root of 68609905 is about 409.3821847116.

The spelling of 68609905 in words is "sixty-eight million, six hundred nine thousand, nine hundred five".