70045691 has 2 divisors, whose sum is σ = 70045692. Its totient is φ = 70045690.

The previous prime is 70045681. The next prime is 70045693. The reversal of 70045691 is 19654007.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70045691 is a prime.

Together with 70045693, 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 (70045693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35022845 + 35022846.

It is an arithmetic number, because the mean of its divisors is an integer number (35022846).

Almost surely, 2^70045691 is an apocalyptic number.

70045691 is a deficient number, since it is larger than the sum of its proper divisors (1).

70045691 is an equidigital number, since it uses as much as digits as its factorization.

70045691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 70045691 is about 8369.3303794270. The cubic root of 70045691 is about 412.2181798336.

Adding to 70045691 its reverse (19654007), we get a palindrome (89699698).

The spelling of 70045691 in words is "seventy million, forty-five thousand, six hundred ninety-one".