70731229 has 2 divisors, whose sum is σ = 70731230. Its totient is φ = 70731228.

The previous prime is 70731217. The next prime is 70731251. The reversal of 70731229 is 92213707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70107129 + 624100 = 8373^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 70731229 - 2²¹ = 68634077 is a prime.

It is a Chen prime.

It is equal to p_4158571 and since 70731229 and 4158571 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70731229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70731289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35365614 + 35365615.

It is an arithmetic number, because the mean of its divisors is an integer number (35365615).

Almost surely, 2^70731229 is an apocalyptic number.

It is an amenable number.

70731229 is a deficient number, since it is larger than the sum of its proper divisors (1).

70731229 is an equidigital number, since it uses as much as digits as its factorization.

70731229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 70731229 is about 8410.1860264800. The cubic root of 70731229 is about 413.5586110807.

The spelling of 70731229 in words is "seventy million, seven hundred thirty-one thousand, two hundred twenty-nine".