68542469 has 4 divisors (see below), whose sum is σ = 68559360. Its totient is φ = 68525580.

The previous prime is 68542459. The next prime is 68542499. The reversal of 68542469 is 96424586.

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 a de Polignac number, because none of the positive numbers 2^k-68542469 is a prime.

It is a super-2 number, since 2×68542469² = 9396140113231922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68542459) 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, 1724 + ... + 11834.

It is an arithmetic number, because the mean of its divisors is an integer number (17139840).

Almost surely, 2^68542469 is an apocalyptic number.

It is an amenable number.

68542469 is a deficient number, since it is larger than the sum of its proper divisors (16891).

68542469 is a wasteful number, since it uses less digits than its factorization.

68542469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16890.

The product of its digits is 414720, while the sum is 44.

The square root of 68542469 is about 8279.0379271990. The cubic root of 68542469 is about 409.2480148379.

The spelling of 68542469 in words is "sixty-eight million, five hundred forty-two thousand, four hundred sixty-nine".