67398893 has 4 divisors (see below), whose sum is σ = 68832960. Its totient is φ = 65964828.

The previous prime is 67398889. The next prime is 67398913. The reversal of 67398893 is 39889376.

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 67398893 - 2² = 67398889 is a prime.

It is a super-2 number, since 2×67398893² = 9085221555250898, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67398853) 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, 716963 + ... + 717056.

It is an arithmetic number, because the mean of its divisors is an integer number (17208240).

Almost surely, 2^67398893 is an apocalyptic number.

It is an amenable number.

67398893 is a deficient number, since it is larger than the sum of its proper divisors (1434067).

67398893 is a wasteful number, since it uses less digits than its factorization.

67398893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1434066.

The product of its digits is 1959552, while the sum is 53.

The square root of 67398893 is about 8209.6828805990. The cubic root of 67398893 is about 406.9592471073.

The spelling of 67398893 in words is "sixty-seven million, three hundred ninety-eight thousand, eight hundred ninety-three".