67861493 has 4 divisors (see below), whose sum is σ = 77556000. Its totient is φ = 58166988.

The previous prime is 67861489. The next prime is 67861513. The reversal of 67861493 is 39416876.

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 67861493 - 2² = 67861489 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 (67861393) 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, 4847243 + ... + 4847256.

It is an arithmetic number, because the mean of its divisors is an integer number (19389000).

Almost surely, 2^67861493 is an apocalyptic number.

It is an amenable number.

67861493 is a deficient number, since it is larger than the sum of its proper divisors (9694507).

67861493 is an equidigital number, since it uses as much as digits as its factorization.

67861493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9694506.

The product of its digits is 217728, while the sum is 44.

The square root of 67861493 is about 8237.8087499043. The cubic root of 67861493 is about 407.8881954478. Note that the first 3 decimals are identical.

The spelling of 67861493 in words is "sixty-seven million, eight hundred sixty-one thousand, four hundred ninety-three".