68840049 has 4 divisors (see below), whose sum is σ = 91786736. Its totient is φ = 45893364.

The previous prime is 68840039. The next prime is 68840063. The reversal of 68840049 is 94004886.

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 68840049 - 2¹³ = 68831857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68839989 and 68840016.

It is not an unprimeable number, because it can be changed into a prime (68840039) 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, 11473339 + ... + 11473344.

It is an arithmetic number, because the mean of its divisors is an integer number (22946684).

Almost surely, 2^68840049 is an apocalyptic number.

It is an amenable number.

68840049 is a deficient number, since it is larger than the sum of its proper divisors (22946687).

68840049 is a wasteful number, since it uses less digits than its factorization.

68840049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22946686.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 68840049 is about 8296.9903579551. The cubic root of 68840049 is about 409.8394155973.

The spelling of 68840049 in words is "sixty-eight million, eight hundred forty thousand, forty-nine".