67239013 has 4 divisors (see below), whose sum is σ = 67376448. Its totient is φ = 67101580.

The previous prime is 67239001. The next prime is 67239037. The reversal of 67239013 is 31093276.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 67239013 - 2⁵ = 67238981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67239113) 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, 67981 + ... + 68962.

It is an arithmetic number, because the mean of its divisors is an integer number (16844112).

Almost surely, 2^67239013 is an apocalyptic number.

It is an amenable number.

67239013 is a deficient number, since it is larger than the sum of its proper divisors (137435).

67239013 is a wasteful number, since it uses less digits than its factorization.

67239013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137434.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 67239013 is about 8199.9398168523. The cubic root of 67239013 is about 406.6372034404.

The spelling of 67239013 in words is "sixty-seven million, two hundred thirty-nine thousand, thirteen".