67493561 has 4 divisors (see below), whose sum is σ = 67870800. Its totient is φ = 67116324.

The previous prime is 67493557. The next prime is 67493593. The reversal of 67493561 is 16539476.

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 67493561 - 2² = 67493557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67493521) 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, 188351 + ... + 188708.

It is an arithmetic number, because the mean of its divisors is an integer number (16967700).

Almost surely, 2^67493561 is an apocalyptic number.

It is an amenable number.

67493561 is a deficient number, since it is larger than the sum of its proper divisors (377239).

67493561 is a wasteful number, since it uses less digits than its factorization.

67493561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377238.

The product of its digits is 136080, while the sum is 41.

The square root of 67493561 is about 8215.4464881709. The cubic root of 67493561 is about 407.1496953108.

The spelling of 67493561 in words is "sixty-seven million, four hundred ninety-three thousand, five hundred sixty-one".