68994381 has 16 divisors (see below), whose sum is σ = 100039104. Its totient is φ = 42119424.

The previous prime is 68994379. The next prime is 68994391. The reversal of 68994381 is 18349986.

It is not a de Polignac number, because 68994381 - 2¹ = 68994379 is a prime.

It is a super-2 number, since 2×68994381² = 9520449219146322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68994381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68994311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16395 + ... + 20168.

It is an arithmetic number, because the mean of its divisors is an integer number (6252444).

Almost surely, 2^68994381 is an apocalyptic number.

It is an amenable number.

68994381 is a deficient number, since it is larger than the sum of its proper divisors (31044723).

68994381 is a wasteful number, since it uses less digits than its factorization.

68994381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36620.

The product of its digits is 373248, while the sum is 48.

The square root of 68994381 is about 8306.2856319777. The cubic root of 68994381 is about 410.1454589970.

The spelling of 68994381 in words is "sixty-eight million, nine hundred ninety-four thousand, three hundred eighty-one".