70881697 has 2 divisors, whose sum is σ = 70881698. Its totient is φ = 70881696.

The previous prime is 70881689. The next prime is 70881703. The reversal of 70881697 is 79618807.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60902416 + 9979281 = 7804^2 + 3159^2 .

It is a cyclic number.

It is not a de Polignac number, because 70881697 - 2³ = 70881689 is a prime.

It is not a weakly prime, because it can be changed into another prime (70881637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35440848 + 35440849.

It is an arithmetic number, because the mean of its divisors is an integer number (35440849).

Almost surely, 2^70881697 is an apocalyptic number.

It is an amenable number.

70881697 is a deficient number, since it is larger than the sum of its proper divisors (1).

70881697 is an equidigital number, since it uses as much as digits as its factorization.

70881697 is an odious number, because the sum of its binary digits is odd.

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

The square root of 70881697 is about 8419.1268549654. The cubic root of 70881697 is about 413.8516606253.

The spelling of 70881697 in words is "seventy million, eight hundred eighty-one thousand, six hundred ninety-seven".