68981901 has 4 divisors (see below), whose sum is σ = 91975872. Its totient is φ = 45987932.

The previous prime is 68981893. The next prime is 68981909. The reversal of 68981901 is 10918986.

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 an interprime number because it is at equal distance from previous prime (68981893) and next prime (68981909).

It is a cyclic number.

It is not a de Polignac number, because 68981901 - 2³ = 68981893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68981909) 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, 11496981 + ... + 11496986.

It is an arithmetic number, because the mean of its divisors is an integer number (22993968).

Almost surely, 2^68981901 is an apocalyptic number.

It is an amenable number.

68981901 is a deficient number, since it is larger than the sum of its proper divisors (22993971).

68981901 is a wasteful number, since it uses less digits than its factorization.

68981901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22993970.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 68981901 is about 8305.5343596905. The cubic root of 68981901 is about 410.1207278817.

The spelling of 68981901 in words is "sixty-eight million, nine hundred eighty-one thousand, nine hundred one".