68783151 has 4 divisors (see below), whose sum is σ = 91710872. Its totient is φ = 45855432.

The previous prime is 68783147. The next prime is 68783161. The reversal of 68783151 is 15138786.

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

It is not a de Polignac number, because 68783151 - 2² = 68783147 is a prime.

It is a super-2 number, since 2×68783151² = 9462243722977602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68783161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11463856 + ... + 11463861.

It is an arithmetic number, because the mean of its divisors is an integer number (22927718).

Almost surely, 2^68783151 is an apocalyptic number.

68783151 is a deficient number, since it is larger than the sum of its proper divisors (22927721).

68783151 is a wasteful number, since it uses less digits than its factorization.

68783151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22927720.

The product of its digits is 40320, while the sum is 39.

The square root of 68783151 is about 8293.5608154761. The cubic root of 68783151 is about 409.7264703425.

It can be divided in two parts, 687 and 83151, that added together give a palindrome (83838).

The spelling of 68783151 in words is "sixty-eight million, seven hundred eighty-three thousand, one hundred fifty-one".