70037081 has 2 divisors, whose sum is σ = 70037082. Its totient is φ = 70037080.

The previous prime is 70037063. The next prime is 70037083. The reversal of 70037081 is 18073007.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43771456 + 26265625 = 6616^2 + 5125^2 .

It is an emirp because it is prime and its reverse (18073007) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70037081 is a prime.

It is a super-2 number, since 2×70037081² = 9810385430001122, which contains 22 as substring.

Together with 70037083, it forms a pair of twin primes.

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 70037081.

It is not a weakly prime, because it can be changed into another prime (70037083) 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, 35018540 + 35018541.

It is an arithmetic number, because the mean of its divisors is an integer number (35018541).

Almost surely, 2^70037081 is an apocalyptic number.

It is an amenable number.

70037081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70037081 is an equidigital number, since it uses as much as digits as its factorization.

70037081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 70037081 is about 8368.8159855502. The cubic root of 70037081 is about 412.2012892206.

The spelling of 70037081 in words is "seventy million, thirty-seven thousand, eighty-one".