68697287 has 4 divisors (see below), whose sum is σ = 69108816. Its totient is φ = 68285760.

The previous prime is 68697269. The next prime is 68697301. The reversal of 68697287 is 78279686.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78279686 = 2 ⋅39139843.

It is a cyclic number.

It is not a de Polignac number, because 68697287 - 2¹⁶ = 68631751 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 (68699287) 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, 205514 + ... + 205847.

It is an arithmetic number, because the mean of its divisors is an integer number (17277204).

Almost surely, 2^68697287 is an apocalyptic number.

68697287 is a deficient number, since it is larger than the sum of its proper divisors (411529).

68697287 is a wasteful number, since it uses less digits than its factorization.

68697287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411528.

The product of its digits is 2032128, while the sum is 53.

The square root of 68697287 is about 8288.3826528461. The cubic root of 68697287 is about 409.5559082095. Note that the first 3 decimals are identical.

The spelling of 68697287 in words is "sixty-eight million, six hundred ninety-seven thousand, two hundred eighty-seven".