68651031 has 4 divisors (see below), whose sum is σ = 91534712. Its totient is φ = 45767352.

The previous prime is 68651029. The next prime is 68651039. The reversal of 68651031 is 13015686.

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

It is not a de Polignac number, because 68651031 - 2¹ = 68651029 is a prime.

It is a super-2 number, since 2×68651031² = 9425928114725922, which contains 22 as substring.

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 68651031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68651039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11441836 + ... + 11441841.

It is an arithmetic number, because the mean of its divisors is an integer number (22883678).

Almost surely, 2^68651031 is an apocalyptic number.

68651031 is a deficient number, since it is larger than the sum of its proper divisors (22883681).

68651031 is a wasteful number, since it uses less digits than its factorization.

68651031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22883680.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 68651031 is about 8285.5917712617. The cubic root of 68651031 is about 409.4639653664.

The spelling of 68651031 in words is "sixty-eight million, six hundred fifty-one thousand, thirty-one".