70731061 has 2 divisors, whose sum is σ = 70731062. Its totient is φ = 70731060.

The previous prime is 70731019. The next prime is 70731071. The reversal of 70731061 is 16013707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70660836 + 70225 = 8406^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 70731061 - 2¹¹ = 70729013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70731071) 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, 35365530 + 35365531.

It is an arithmetic number, because the mean of its divisors is an integer number (35365531).

Almost surely, 2^70731061 is an apocalyptic number.

It is an amenable number.

70731061 is a deficient number, since it is larger than the sum of its proper divisors (1).

70731061 is an equidigital number, since it uses as much as digits as its factorization.

70731061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 70731061 is about 8410.1760385856. The cubic root of 70731061 is about 413.5582836539.

Adding to 70731061 its reverse (16013707), we get a palindrome (86744768).

The spelling of 70731061 in words is "seventy million, seven hundred thirty-one thousand, sixty-one".