67500921 has 4 divisors (see below), whose sum is σ = 90001232. Its totient is φ = 45000612.

The previous prime is 67500887. The next prime is 67500949. The reversal of 67500921 is 12900576.

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 not a de Polignac number, because 67500921 - 2¹³ = 67492729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67500971) 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, 11250151 + ... + 11250156.

It is an arithmetic number, because the mean of its divisors is an integer number (22500308).

Almost surely, 2^67500921 is an apocalyptic number.

It is an amenable number.

67500921 is a deficient number, since it is larger than the sum of its proper divisors (22500311).

67500921 is a wasteful number, since it uses less digits than its factorization.

67500921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22500310.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 67500921 is about 8215.8944126614. The cubic root of 67500921 is about 407.1644943168.

The spelling of 67500921 in words is "sixty-seven million, five hundred thousand, nine hundred twenty-one".