68972511 has 4 divisors (see below), whose sum is σ = 91963352. Its totient is φ = 45981672.

The previous prime is 68972509. The next prime is 68972569. The reversal of 68972511 is 11527986.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 68972511 - 2¹ = 68972509 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68972511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68970511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11495416 + ... + 11495421.

It is an arithmetic number, because the mean of its divisors is an integer number (22990838).

Almost surely, 2^68972511 is an apocalyptic number.

68972511 is a deficient number, since it is larger than the sum of its proper divisors (22990841).

68972511 is a wasteful number, since it uses less digits than its factorization.

68972511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22990840.

The product of its digits is 30240, while the sum is 39.

The square root of 68972511 is about 8304.9690547286. The cubic root of 68972511 is about 410.1021181288.

The spelling of 68972511 in words is "sixty-eight million, nine hundred seventy-two thousand, five hundred eleven".