70769581 has 2 divisors, whose sum is σ = 70769582. Its totient is φ = 70769580.

The previous prime is 70769579. The next prime is 70769669. The reversal of 70769581 is 18596707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69056100 + 1713481 = 8310^2 + 1309^2 .

It is a cyclic number.

It is not a de Polignac number, because 70769581 - 2¹ = 70769579 is a prime.

It is a super-2 number, since 2×70769581² = 10016667189831122, which contains 22 as substring.

Together with 70769579, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70709581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35384790 + 35384791.

It is an arithmetic number, because the mean of its divisors is an integer number (35384791).

Almost surely, 2^70769581 is an apocalyptic number.

It is an amenable number.

70769581 is a deficient number, since it is larger than the sum of its proper divisors (1).

70769581 is an equidigital number, since it uses as much as digits as its factorization.

70769581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 70769581 is about 8412.4658097374. The cubic root of 70769581 is about 413.6333443786.

The spelling of 70769581 in words is "seventy million, seven hundred sixty-nine thousand, five hundred eighty-one".