67487649 has 4 divisors (see below), whose sum is σ = 89983536. Its totient is φ = 44991764.

The previous prime is 67487647. The next prime is 67487659. The reversal of 67487649 is 94678476.

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 a cyclic number.

It is not a de Polignac number, because 67487649 - 2¹ = 67487647 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67487647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11247939 + ... + 11247944.

It is an arithmetic number, because the mean of its divisors is an integer number (22495884).

Almost surely, 2^67487649 is an apocalyptic number.

It is an amenable number.

67487649 is a deficient number, since it is larger than the sum of its proper divisors (22495887).

67487649 is a wasteful number, since it uses less digits than its factorization.

67487649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22495886.

The product of its digits is 2032128, while the sum is 51.

The square root of 67487649 is about 8215.0866702671. The cubic root of 67487649 is about 407.1378070692.

The spelling of 67487649 in words is "sixty-seven million, four hundred eighty-seven thousand, six hundred forty-nine".