67390987 has 2 divisors, whose sum is σ = 67390988. Its totient is φ = 67390986.

The previous prime is 67390979. The next prime is 67390991. The reversal of 67390987 is 78909376.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 67390987 - 2³ = 67390979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67390987.

It is not a weakly prime, because it can be changed into another prime (67390957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33695493 + 33695494.

It is an arithmetic number, because the mean of its divisors is an integer number (33695494).

Almost surely, 2^67390987 is an apocalyptic number.

67390987 is a deficient number, since it is larger than the sum of its proper divisors (1).

67390987 is an equidigital number, since it uses as much as digits as its factorization.

67390987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 67390987 is about 8209.2013618866. The cubic root of 67390987 is about 406.9433341574.

The spelling of 67390987 in words is "sixty-seven million, three hundred ninety thousand, nine hundred eighty-seven".