68447641 has 4 divisors (see below), whose sum is σ = 68504832. Its totient is φ = 68390452.

The previous prime is 68447629. The next prime is 68447653. The reversal of 68447641 is 14674486.

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 (68447629) and next prime (68447653).

It is a cyclic number.

It is not a de Polignac number, because 68447641 - 2¹⁵ = 68414873 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68447594 and 68447603.

It is not an unprimeable number, because it can be changed into a prime (68447941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26761 + ... + 29206.

It is an arithmetic number, because the mean of its divisors is an integer number (17126208).

Almost surely, 2^68447641 is an apocalyptic number.

68447641 is the 5233-rd centered pentagonal number.

It is an amenable number.

68447641 is a deficient number, since it is larger than the sum of its proper divisors (57191).

68447641 is a wasteful number, since it uses less digits than its factorization.

68447641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57190.

The product of its digits is 129024, while the sum is 40.

The square root of 68447641 is about 8273.3089510788. The cubic root of 68447641 is about 409.0591971991.

The spelling of 68447641 in words is "sixty-eight million, four hundred forty-seven thousand, six hundred forty-one".