70915081 has 2 divisors, whose sum is σ = 70915082. Its totient is φ = 70915080.

The previous prime is 70915067. The next prime is 70915093. The reversal of 70915081 is 18051907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39375625 + 31539456 = 6275^2 + 5616^2 .

It is a cyclic number.

It is not a de Polignac number, because 70915081 - 2¹⁵ = 70882313 is a prime.

It is a super-2 number, since 2×70915081² = 10057897426473122, which contains 22 as substring.

It is equal to p_4168660 and since 70915081 and 4168660 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (70915021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35457540 + 35457541.

It is an arithmetic number, because the mean of its divisors is an integer number (35457541).

Almost surely, 2^70915081 is an apocalyptic number.

It is an amenable number.

70915081 is a deficient number, since it is larger than the sum of its proper divisors (1).

70915081 is an equidigital number, since it uses as much as digits as its factorization.

70915081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 70915081 is about 8421.1092499741. The cubic root of 70915081 is about 413.9166226487.

Adding to 70915081 its reverse (18051907), we get a palindrome (88966988).

The spelling of 70915081 in words is "seventy million, nine hundred fifteen thousand, eighty-one".