73987567 has 6 divisors (see below), whose sum is σ = 74354768. Its totient is φ = 73621632.

The previous prime is 73987561. The next prime is 73987583. The reversal of 73987567 is 76578937.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-73987567 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 (73987561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 164559 + ... + 165007.

Almost surely, 2^73987567 is an apocalyptic number.

73987567 is a deficient number, since it is larger than the sum of its proper divisors (367201).

73987567 is an frugal number, since it uses more digits than its factorization.

73987567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 816 counting only the distinct ones).

The product of its digits is 2222640, while the sum is 52.

The square root of 73987567 is about 8601.6025832399. The cubic root of 73987567 is about 419.8101314886.

The spelling of 73987567 in words is "seventy-three million, nine hundred eighty-seven thousand, five hundred sixty-seven".