70681549 has 2 divisors, whose sum is σ = 70681550. Its totient is φ = 70681548.

The previous prime is 70681547. The next prime is 70681573. The reversal of 70681549 is 94518607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62125924 + 8555625 = 7882^2 + 2925^2 .

It is a cyclic number.

It is not a de Polignac number, because 70681549 - 2¹ = 70681547 is a prime.

Together with 70681547, 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 (70681547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35340774 + 35340775.

It is an arithmetic number, because the mean of its divisors is an integer number (35340775).

Almost surely, 2^70681549 is an apocalyptic number.

It is an amenable number.

70681549 is a deficient number, since it is larger than the sum of its proper divisors (1).

70681549 is an equidigital number, since it uses as much as digits as its factorization.

70681549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 70681549 is about 8407.2319463662. The cubic root of 70681549 is about 413.4617636946.

The spelling of 70681549 in words is "seventy million, six hundred eighty-one thousand, five hundred forty-nine".