70668989 has 2 divisors, whose sum is σ = 70668990. Its totient is φ = 70668988.

The previous prime is 70668977. The next prime is 70669007. The reversal of 70668989 is 98986607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70644025 + 24964 = 8405^2 + 158^2 .

It is an emirp because it is prime and its reverse (98986607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70668989 - 2⁴ = 70668973 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70668989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70668919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35334494 + 35334495.

It is an arithmetic number, because the mean of its divisors is an integer number (35334495).

Almost surely, 2^70668989 is an apocalyptic number.

It is an amenable number.

70668989 is a deficient number, since it is larger than the sum of its proper divisors (1).

70668989 is an equidigital number, since it uses as much as digits as its factorization.

70668989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 70668989 is about 8406.4849372374. The cubic root of 70668989 is about 413.4372717423.

The spelling of 70668989 in words is "seventy million, six hundred sixty-eight thousand, nine hundred eighty-nine".