70475681 has 2 divisors, whose sum is σ = 70475682. Its totient is φ = 70475680.

The previous prime is 70475633. The next prime is 70475683. The reversal of 70475681 is 18657407.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46022656 + 24453025 = 6784^2 + 4945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70475681 is a prime.

It is a super-2 number, since 2×70475681² = 9933643224827522, which contains 22 as substring.

Together with 70475683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70475683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35237840 + 35237841.

It is an arithmetic number, because the mean of its divisors is an integer number (35237841).

Almost surely, 2^70475681 is an apocalyptic number.

It is an amenable number.

70475681 is a deficient number, since it is larger than the sum of its proper divisors (1).

70475681 is an equidigital number, since it uses as much as digits as its factorization.

70475681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 70475681 is about 8394.9795115891. The cubic root of 70475681 is about 413.0599552987.

The spelling of 70475681 in words is "seventy million, four hundred seventy-five thousand, six hundred eighty-one".