68953985 has 4 divisors (see below), whose sum is σ = 82744788. Its totient is φ = 55163184.

The previous prime is 68953957. The next prime is 68953991. The reversal of 68953985 is 58935986.

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 49098049 + 19855936 = 7007^2 + 4456^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68953985 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6895394 + ... + 6895403.

It is an arithmetic number, because the mean of its divisors is an integer number (20686197).

Almost surely, 2^68953985 is an apocalyptic number.

It is an amenable number.

68953985 is a deficient number, since it is larger than the sum of its proper divisors (13790803).

68953985 is a wasteful number, since it uses less digits than its factorization.

68953985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13790802.

The product of its digits is 2332800, while the sum is 53.

The square root of 68953985 is about 8303.8536234690. The cubic root of 68953985 is about 410.0653970638.

The spelling of 68953985 in words is "sixty-eight million, nine hundred fifty-three thousand, nine hundred eighty-five".