68744381 has 8 divisors (see below), whose sum is σ = 70338240. Its totient is φ = 67164928.

The previous prime is 68744369. The next prime is 68744399. The reversal of 68744381 is 18344786.

68744381 = T₂₅₃ + T₂₅₄ + ... + T₇₅₃.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68744381 - 2⁶ = 68744317 is a prime.

It is a super-2 number, since 2×68744381² = 9451579838146322, 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 (68744321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6365 + ... + 13341.

It is an arithmetic number, because the mean of its divisors is an integer number (8792280).

Almost surely, 2^68744381 is an apocalyptic number.

It is an amenable number.

68744381 is a deficient number, since it is larger than the sum of its proper divisors (1593859).

68744381 is a wasteful number, since it uses less digits than its factorization.

68744381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203.

The product of its digits is 129024, while the sum is 41.

The square root of 68744381 is about 8291.2231305158. The cubic root of 68744381 is about 409.6494743509.

The spelling of 68744381 in words is "sixty-eight million, seven hundred forty-four thousand, three hundred eighty-one".