68762981 has 4 divisors (see below), whose sum is σ = 78586272. Its totient is φ = 58939692.

The previous prime is 68762963. The next prime is 68762987. The reversal of 68762981 is 18926786.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68762981 - 2⁶ = 68762917 is a prime.

It is a super-2 number, since 2×68762981² = 9456695112012722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68762987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4911635 + ... + 4911648.

It is an arithmetic number, because the mean of its divisors is an integer number (19646568).

Almost surely, 2^68762981 is an apocalyptic number.

It is an amenable number.

68762981 is a deficient number, since it is larger than the sum of its proper divisors (9823291).

68762981 is an equidigital number, since it uses as much as digits as its factorization.

68762981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9823290.

The product of its digits is 290304, while the sum is 47.

The square root of 68762981 is about 8292.3447226945. The cubic root of 68762981 is about 409.6864169733.

The spelling of 68762981 in words is "sixty-eight million, seven hundred sixty-two thousand, nine hundred eighty-one".