70781197 has 2 divisors, whose sum is σ = 70781198. Its totient is φ = 70781196.

The previous prime is 70781177. The next prime is 70781209. The reversal of 70781197 is 79118707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56987401 + 13793796 = 7549^2 + 3714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70781197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70781177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35390598 + 35390599.

It is an arithmetic number, because the mean of its divisors is an integer number (35390599).

Almost surely, 2^70781197 is an apocalyptic number.

It is an amenable number.

70781197 is a deficient number, since it is larger than the sum of its proper divisors (1).

70781197 is an equidigital number, since it uses as much as digits as its factorization.

70781197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24696, while the sum is 40.

The square root of 70781197 is about 8413.1561854039. The cubic root of 70781197 is about 413.6559741677.

The spelling of 70781197 in words is "seventy million, seven hundred eighty-one thousand, one hundred ninety-seven".