67142091 has 8 divisors (see below), whose sum is σ = 89672704. Its totient is φ = 44686440.

The previous prime is 67142081. The next prime is 67142137. The reversal of 67142091 is 19024176.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67142091 - 2⁹ = 67141579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67142011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16615 + ... + 20256.

It is an arithmetic number, because the mean of its divisors is an integer number (11209088).

Almost surely, 2^67142091 is an apocalyptic number.

67142091 is a deficient number, since it is larger than the sum of its proper divisors (22530613).

67142091 is a wasteful number, since it uses less digits than its factorization.

67142091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37481.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 67142091 is about 8194.0277641707. The cubic root of 67142091 is about 406.4417264330.

The spelling of 67142091 in words is "sixty-seven million, one hundred forty-two thousand, ninety-one".