68491047 has 8 divisors (see below), whose sum is σ = 91523056. Its totient is φ = 45559872.

The previous prime is 68491043. The next prime is 68491051. The reversal of 68491047 is 74019486.

It is a happy number.

68491047 is nontrivially palindromic in base 14.

It is an interprime number because it is at equal distance from previous prime (68491043) and next prime (68491051).

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

It is not a de Polignac number, because 68491047 - 2² = 68491043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68490996 and 68491014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68491043) 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, 23608 + ... + 26349.

It is an arithmetic number, because the mean of its divisors is an integer number (11440382).

Almost surely, 2^68491047 is an apocalyptic number.

68491047 is a deficient number, since it is larger than the sum of its proper divisors (23032009).

68491047 is a wasteful number, since it uses less digits than its factorization.

68491047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50417.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 68491047 is about 8275.9317904391. The cubic root of 68491047 is about 409.1456470818.

The spelling of 68491047 in words is "sixty-eight million, four hundred ninety-one thousand, forty-seven".