70309903 has 2 divisors, whose sum is σ = 70309904. Its totient is φ = 70309902.

The previous prime is 70309901. The next prime is 70309913. The reversal of 70309903 is 30990307.

It is a weak prime.

It is an emirp because it is prime and its reverse (30990307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70309903 - 2¹ = 70309901 is a prime.

Together with 70309901, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70309901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35154951 + 35154952.

It is an arithmetic number, because the mean of its divisors is an integer number (35154952).

Almost surely, 2^70309903 is an apocalyptic number.

70309903 is a deficient number, since it is larger than the sum of its proper divisors (1).

70309903 is an equidigital number, since it uses as much as digits as its factorization.

70309903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 70309903 is about 8385.1000590333. The cubic root of 70309903 is about 412.7358245055.

The spelling of 70309903 in words is "seventy million, three hundred nine thousand, nine hundred three".