70973281 has 2 divisors, whose sum is σ = 70973282. Its totient is φ = 70973280.

The previous prime is 70973267. The next prime is 70973293. The reversal of 70973281 is 18237907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69889600 + 1083681 = 8360^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 70973281 - 2²³ = 62584673 is a prime.

It is a super-2 number, since 2×70973281² = 10074413231809922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70973281.

It is not a weakly prime, because it can be changed into another prime (70973081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35486640 + 35486641.

It is an arithmetic number, because the mean of its divisors is an integer number (35486641).

Almost surely, 2^70973281 is an apocalyptic number.

It is an amenable number.

70973281 is a deficient number, since it is larger than the sum of its proper divisors (1).

70973281 is an equidigital number, since it uses as much as digits as its factorization.

70973281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 70973281 is about 8424.5641430284. The cubic root of 70973281 is about 414.0298254629.

The spelling of 70973281 in words is "seventy million, nine hundred seventy-three thousand, two hundred eighty-one".