68491849 has 4 divisors (see below), whose sum is σ = 69317136. Its totient is φ = 67666564.

The previous prime is 68491811. The next prime is 68491859. The reversal of 68491849 is 94819486.

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 68491849 - 2¹¹ = 68489801 is a prime.

It is a super-2 number, since 2×68491849² = 9382266758877602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68491859) 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, 412519 + ... + 412684.

It is an arithmetic number, because the mean of its divisors is an integer number (17329284).

Almost surely, 2^68491849 is an apocalyptic number.

It is an amenable number.

68491849 is a deficient number, since it is larger than the sum of its proper divisors (825287).

68491849 is an equidigital number, since it uses as much as digits as its factorization.

68491849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 825286.

The product of its digits is 497664, while the sum is 49.

The square root of 68491849 is about 8275.9802440557. The cubic root of 68491849 is about 409.1472440474.

The spelling of 68491849 in words is "sixty-eight million, four hundred ninety-one thousand, eight hundred forty-nine".