68387477 has 4 divisors (see below), whose sum is σ = 68411136. Its totient is φ = 68363820.

The previous prime is 68387471. The next prime is 68387489. The reversal of 68387477 is 77478386.

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 68387477 - 2⁴ = 68387461 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 (68387471) 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, 6773 + ... + 13514.

It is an arithmetic number, because the mean of its divisors is an integer number (17102784).

Almost surely, 2^68387477 is an apocalyptic number.

It is an amenable number.

68387477 is a deficient number, since it is larger than the sum of its proper divisors (23659).

68387477 is a wasteful number, since it uses less digits than its factorization.

68387477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23658.

The product of its digits is 1580544, while the sum is 50.

The square root of 68387477 is about 8269.6721216745. The cubic root of 68387477 is about 408.9393106628.

Subtracting 68387477 from its reverse (77478386), we obtain a palindrome (9090909).

The spelling of 68387477 in words is "sixty-eight million, three hundred eighty-seven thousand, four hundred seventy-seven".