67487987 has 4 divisors (see below), whose sum is σ = 77129136. Its totient is φ = 57846840.

The previous prime is 67487983. The next prime is 67488073. The reversal of 67487987 is 78978476.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67487987 - 2² = 67487983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67487983) 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, 4820564 + ... + 4820577.

It is an arithmetic number, because the mean of its divisors is an integer number (19282284).

Almost surely, 2^67487987 is an apocalyptic number.

67487987 is a deficient number, since it is larger than the sum of its proper divisors (9641149).

67487987 is an equidigital number, since it uses as much as digits as its factorization.

67487987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9641148.

The product of its digits is 4741632, while the sum is 56.

The square root of 67487987 is about 8215.1072421485. The cubic root of 67487987 is about 407.1384867607.

The spelling of 67487987 in words is "sixty-seven million, four hundred eighty-seven thousand, nine hundred eighty-seven".