70722529 has 2 divisors, whose sum is σ = 70722530. Its totient is φ = 70722528.

The previous prime is 70722517. The next prime is 70722583. The reversal of 70722529 is 92522707.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40030929 + 30691600 = 6327^2 + 5540^2 .

It is an emirp because it is prime and its reverse (92522707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70722529 - 2⁵ = 70722497 is a prime.

It is a super-2 number, since 2×70722529² = 10003352216311682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70722494 and 70722503.

It is not a weakly prime, because it can be changed into another prime (70722629) 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, 35361264 + 35361265.

It is an arithmetic number, because the mean of its divisors is an integer number (35361265).

Almost surely, 2^70722529 is an apocalyptic number.

It is an amenable number.

70722529 is a deficient number, since it is larger than the sum of its proper divisors (1).

70722529 is an equidigital number, since it uses as much as digits as its factorization.

70722529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 70722529 is about 8409.6687806358. The cubic root of 70722529 is about 413.5416543677.

The spelling of 70722529 in words is "seventy million, seven hundred twenty-two thousand, five hundred twenty-nine".