67145137 has 4 divisors (see below), whose sum is σ = 67163940. Its totient is φ = 67126336.

The previous prime is 67145129. The next prime is 67145149. The reversal of 67145137 is 73154176.

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

It can be written as a sum of positive squares in 2 ways, for example, as 55591936 + 11553201 = 7456^2 + 3399^2 .

It is a cyclic number.

It is not a de Polignac number, because 67145137 - 2³ = 67145129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67145737) 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, 2212 + ... + 11797.

It is an arithmetic number, because the mean of its divisors is an integer number (16790985).

Almost surely, 2^67145137 is an apocalyptic number.

It is an amenable number.

67145137 is a deficient number, since it is larger than the sum of its proper divisors (18803).

67145137 is a wasteful number, since it uses less digits than its factorization.

67145137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18802.

The product of its digits is 17640, while the sum is 34.

The square root of 67145137 is about 8194.2136291410. The cubic root of 67145137 is about 406.4478726162.

The spelling of 67145137 in words is "sixty-seven million, one hundred forty-five thousand, one hundred thirty-seven".