67990 has 16 divisors (see below), whose sum is σ = 132048. Its totient is φ = 25056.

The previous prime is 67987. The next prime is 67993. The reversal of 67990 is 9976.

It is an interprime number because it is at equal distance from previous prime (67987) and next prime (67993).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 391.

It is an arithmetic number, because the mean of its divisors is an integer number (8253).

2⁶⁷⁹⁹⁰ is an apocalyptic number.

67990 is a deficient number, since it is larger than the sum of its proper divisors (64058).

67990 is a wasteful number, since it uses less digits than its factorization.

67990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 67990 is about 260.7489213784. The cubic root of 67990 is about 40.8145501098.

The spelling of 67990 in words is "sixty-seven thousand, nine hundred ninety".