70731071 has 2 divisors, whose sum is σ = 70731072. Its totient is φ = 70731070.

The previous prime is 70731061. The next prime is 70731083. The reversal of 70731071 is 17013707.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70731071 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70731071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70731061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35365535 + 35365536.

It is an arithmetic number, because the mean of its divisors is an integer number (35365536).

Almost surely, 2^70731071 is an apocalyptic number.

70731071 is a deficient number, since it is larger than the sum of its proper divisors (1).

70731071 is an equidigital number, since it uses as much as digits as its factorization.

70731071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1029, while the sum is 26.

The square root of 70731071 is about 8410.1766331035. The cubic root of 70731071 is about 413.5583031436.

Adding to 70731071 its reverse (17013707), we get a palindrome (87744778).

The spelling of 70731071 in words is "seventy million, seven hundred thirty-one thousand, seventy-one".