68461749 has 12 divisors (see below), whose sum is σ = 99037900. Its totient is φ = 45572544.

The previous prime is 68461747. The next prime is 68461787. The reversal of 68461749 is 94716486.

It can be written as a sum of positive squares in 2 ways, for example, as 28998225 + 39463524 = 5385^2 + 6282^2 .

It is not a de Polignac number, because 68461749 - 2¹ = 68461747 is a prime.

It is a super-2 number, since 2×68461749² = 9374022152278002, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68461741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1017 + ... + 11745.

Almost surely, 2^68461749 is an apocalyptic number.

It is an amenable number.

68461749 is a deficient number, since it is larger than the sum of its proper divisors (30576151).

68461749 is a wasteful number, since it uses less digits than its factorization.

68461749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11444 (or 11441 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 68461749 is about 8274.1615285176. The cubic root of 68461749 is about 409.0872995102.

The spelling of 68461749 in words is "sixty-eight million, four hundred sixty-one thousand, seven hundred forty-nine".