70065731 has 2 divisors, whose sum is σ = 70065732. Its totient is φ = 70065730.

The previous prime is 70065727. The next prime is 70065733. The reversal of 70065731 is 13756007.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70065731 - 2² = 70065727 is a prime.

It is a super-2 number, since 2×70065731² = 9818413321128722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 70065733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70065694 and 70065703.

It is not a weakly prime, because it can be changed into another prime (70065733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35032865 + 35032866.

It is an arithmetic number, because the mean of its divisors is an integer number (35032866).

Almost surely, 2^70065731 is an apocalyptic number.

70065731 is a deficient number, since it is larger than the sum of its proper divisors (1).

70065731 is an equidigital number, since it uses as much as digits as its factorization.

70065731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4410, while the sum is 29.

The square root of 70065731 is about 8370.5275222055. The cubic root of 70065731 is about 412.2574878173.

The spelling of 70065731 in words is "seventy million, sixty-five thousand, seven hundred thirty-one".