67491 has 6 divisors (see below), whose sum is σ = 97500. Its totient is φ = 44988.

The previous prime is 67489. The next prime is 67493. The reversal of 67491 is 19476.

It is an interprime number because it is at equal distance from previous prime (67489) and next prime (67493).

It is not a de Polignac number, because 67491 - 2¹ = 67489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67493) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3741 + ... + 3758.

It is an arithmetic number, because the mean of its divisors is an integer number (16250).

2⁶⁷⁴⁹¹ is an apocalyptic number.

67491 is a deficient number, since it is larger than the sum of its proper divisors (30009).

67491 is a wasteful number, since it uses less digits than its factorization.

67491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505 (or 7502 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 67491 is about 259.7903000499. The cubic root of 67491 is about 40.7144545567.

The spelling of 67491 in words is "sixty-seven thousand, four hundred ninety-one".