70623691 has 2 divisors, whose sum is σ = 70623692. Its totient is φ = 70623690.

The previous prime is 70623677. The next prime is 70623697. The reversal of 70623691 is 19632607.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70623691 - 2¹⁷ = 70492619 is a prime.

It is not a weakly prime, because it can be changed into another prime (70623697) 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, 35311845 + 35311846.

It is an arithmetic number, because the mean of its divisors is an integer number (35311846).

Almost surely, 2^70623691 is an apocalyptic number.

70623691 is a deficient number, since it is larger than the sum of its proper divisors (1).

70623691 is an equidigital number, since it uses as much as digits as its factorization.

70623691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 70623691 is about 8403.7902758220. The cubic root of 70623691 is about 413.3489167006.

The spelling of 70623691 in words is "seventy million, six hundred twenty-three thousand, six hundred ninety-one".