68853557 has 4 divisors (see below), whose sum is σ = 68872416. Its totient is φ = 68834700.

The previous prime is 68853541. The next prime is 68853581. The reversal of 68853557 is 75535886.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75535886 = 2 ⋅37767943.

It is a cyclic number.

It is not a de Polignac number, because 68853557 - 2⁴ = 68853541 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 (68853157) 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, 2003 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (17218104).

Almost surely, 2^68853557 is an apocalyptic number.

It is an amenable number.

68853557 is a deficient number, since it is larger than the sum of its proper divisors (18859).

68853557 is a wasteful number, since it uses less digits than its factorization.

68853557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18858.

The product of its digits is 1008000, while the sum is 47.

The square root of 68853557 is about 8297.8043481393. The cubic root of 68853557 is about 409.8662204821.

It can be divided in two parts, 688 and 53557, that added together give a palindrome (54245).

The spelling of 68853557 in words is "sixty-eight million, eight hundred fifty-three thousand, five hundred fifty-seven".