67561047 has 12 divisors (see below), whose sum is σ = 101202920. Its totient is φ = 45040536.

The previous prime is 67561033. The next prime is 67561049. The reversal of 67561047 is 74016576.

It is not a de Polignac number, because 67561047 - 2¹⁴ = 67544663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67561049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138772 + ... + 139257.

Almost surely, 2^67561047 is an apocalyptic number.

67561047 is a deficient number, since it is larger than the sum of its proper divisors (33641873).

67561047 is an equidigital number, since it uses as much as digits as its factorization.

67561047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278044 (or 278032 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 67561047 is about 8219.5527250575. The cubic root of 67561047 is about 407.2853514686.

The spelling of 67561047 in words is "sixty-seven million, five hundred sixty-one thousand, forty-seven".