68700157 has 8 divisors (see below), whose sum is σ = 71077176. Its totient is φ = 66350592.

The previous prime is 68700119. The next prime is 68700161. The reversal of 68700157 is 75100786.

It can be written as a sum of positive squares in 4 ways, for example, as 36312676 + 32387481 = 6026^2 + 5691^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68700157 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 (68700167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1708 + ... + 11845.

It is an arithmetic number, because the mean of its divisors is an integer number (8884647).

Almost surely, 2^68700157 is an apocalyptic number.

It is an amenable number.

68700157 is a deficient number, since it is larger than the sum of its proper divisors (2377019).

68700157 is a wasteful number, since it uses less digits than its factorization.

68700157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13727.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 68700157 is about 8288.5557849362. Note that the first 3 decimals coincide. The cubic root of 68700157 is about 409.5616115356.

The spelling of 68700157 in words is "sixty-eight million, seven hundred thousand, one hundred fifty-seven".