70988789 has 2 divisors, whose sum is σ = 70988790. Its totient is φ = 70988788.

The previous prime is 70988767. The next prime is 70988837. The reversal of 70988789 is 98788907.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 21003889 = 7070^2 + 4583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70988789 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70981789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35494394 + 35494395.

It is an arithmetic number, because the mean of its divisors is an integer number (35494395).

Almost surely, 2^70988789 is an apocalyptic number.

It is an amenable number.

70988789 is a deficient number, since it is larger than the sum of its proper divisors (1).

70988789 is an equidigital number, since it uses as much as digits as its factorization.

70988789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2032128, while the sum is 56.

The square root of 70988789 is about 8425.4844964548. The cubic root of 70988789 is about 414.0599790966.

It can be divided in two parts, 709 and 88789, that added together give a palindrome (89498).

The spelling of 70988789 in words is "seventy million, nine hundred eighty-eight thousand, seven hundred eighty-nine".