70861789 has 2 divisors, whose sum is σ = 70861790. Its totient is φ = 70861788.

The previous prime is 70861751. The next prime is 70861801. The reversal of 70861789 is 98716807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59752900 + 11108889 = 7730^2 + 3333^2 .

It is a cyclic number.

It is not a de Polignac number, because 70861789 - 2¹¹ = 70859741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70861709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35430894 + 35430895.

It is an arithmetic number, because the mean of its divisors is an integer number (35430895).

Almost surely, 2^70861789 is an apocalyptic number.

It is an amenable number.

70861789 is a deficient number, since it is larger than the sum of its proper divisors (1).

70861789 is an equidigital number, since it uses as much as digits as its factorization.

70861789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The square root of 70861789 is about 8417.9444640601. The cubic root of 70861789 is about 413.8129118807.

The spelling of 70861789 in words is "seventy million, eight hundred sixty-one thousand, seven hundred eighty-nine".