70731329 has 2 divisors, whose sum is σ = 70731330. Its totient is φ = 70731328.

The previous prime is 70731301. The next prime is 70731341. The reversal of 70731329 is 92313707.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69338929 + 1392400 = 8327^2 + 1180^2 .

It is an emirp because it is prime and its reverse (92313707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70731329 - 2¹² = 70727233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70731295 and 70731304.

It is not a weakly prime, because it can be changed into another prime (70731389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35365664 + 35365665.

It is an arithmetic number, because the mean of its divisors is an integer number (35365665).

Almost surely, 2^70731329 is an apocalyptic number.

It is an amenable number.

70731329 is a deficient number, since it is larger than the sum of its proper divisors (1).

70731329 is an equidigital number, since it uses as much as digits as its factorization.

70731329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 70731329 is about 8410.1919716496. The cubic root of 70731329 is about 413.5588059774.

The spelling of 70731329 in words is "seventy million, seven hundred thirty-one thousand, three hundred twenty-nine".