70399999 has 2 divisors, whose sum is σ = 70400000. Its totient is φ = 70399998.

The previous prime is 70399991. The next prime is 70400003. The reversal of 70399999 is 99999307.

It is a strong prime.

It is an emirp because it is prime and its reverse (99999307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70399999 - 2³ = 70399991 is a prime.

70399999 is a modest number, since divided by 9999 gives 7039 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70399991) 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, 35199999 + 35200000.

It is an arithmetic number, because the mean of its divisors is an integer number (35200000).

Almost surely, 2^70399999 is an apocalyptic number.

70399999 is a deficient number, since it is larger than the sum of its proper divisors (1).

70399999 is an equidigital number, since it uses as much as digits as its factorization.

70399999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1240029, while the sum is 55.

The square root of 70399999 is about 8390.4707257698. The cubic root of 70399999 is about 412.9120442275.

The spelling of 70399999 in words is "seventy million, three hundred ninety-nine thousand, nine hundred ninety-nine".