68570989 has 4 divisors (see below), whose sum is σ = 68607324. Its totient is φ = 68534656.

The previous prime is 68570987. The next prime is 68571023. The reversal of 68570989 is 98907586.

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 12545764 + 56025225 = 3542^2 + 7485^2 .

It is a cyclic number.

It is not a de Polignac number, because 68570989 - 2¹ = 68570987 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 (68570987) 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, 15172 + ... + 19165.

It is an arithmetic number, because the mean of its divisors is an integer number (17151831).

Almost surely, 2^68570989 is an apocalyptic number.

It is an amenable number.

68570989 is a deficient number, since it is larger than the sum of its proper divisors (36335).

68570989 is a wasteful number, since it uses less digits than its factorization.

68570989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36334.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The square root of 68570989 is about 8280.7601704191. The cubic root of 68570989 is about 409.3047686291.

The spelling of 68570989 in words is "sixty-eight million, five hundred seventy thousand, nine hundred eighty-nine".