68578357 has 4 divisors (see below), whose sum is σ = 72612396. Its totient is φ = 64544320.

The previous prime is 68578339. The next prime is 68578373. The reversal of 68578357 is 75387586.

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 39050001 + 29528356 = 6249^2 + 5434^2 .

It is a cyclic number.

It is not a de Polignac number, because 68578357 - 2⁷ = 68578229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68578357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68575357) 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, 2016994 + ... + 2017027.

It is an arithmetic number, because the mean of its divisors is an integer number (18153099).

Almost surely, 2^68578357 is an apocalyptic number.

It is an amenable number.

68578357 is a deficient number, since it is larger than the sum of its proper divisors (4034039).

68578357 is a wasteful number, since it uses less digits than its factorization.

68578357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034038.

The product of its digits is 1411200, while the sum is 49.

The square root of 68578357 is about 8281.2050451610. The cubic root of 68578357 is about 409.3194281305.

The spelling of 68578357 in words is "sixty-eight million, five hundred seventy-eight thousand, three hundred fifty-seven".