68897261 has 4 divisors (see below), whose sum is σ = 70577724. Its totient is φ = 67216800.

The previous prime is 68897233. The next prime is 68897263. The reversal of 68897261 is 16279886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1755625 + 67141636 = 1325^2 + 8194^2 .

It is a cyclic number.

It is not a de Polignac number, because 68897261 - 2¹⁸ = 68635117 is a prime.

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 (68897263) 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, 840170 + ... + 840251.

It is an arithmetic number, because the mean of its divisors is an integer number (17644431).

Almost surely, 2^68897261 is an apocalyptic number.

It is an amenable number.

68897261 is a deficient number, since it is larger than the sum of its proper divisors (1680463).

68897261 is a wasteful number, since it uses less digits than its factorization.

68897261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680462.

The product of its digits is 290304, while the sum is 47.

The square root of 68897261 is about 8300.4373981134. The cubic root of 68897261 is about 409.9529214236.

The spelling of 68897261 in words is "sixty-eight million, eight hundred ninety-seven thousand, two hundred sixty-one".