70903909 has 2 divisors, whose sum is σ = 70903910. Its totient is φ = 70903908.

The previous prime is 70903907. The next prime is 70903961. The reversal of 70903909 is 90930907.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45603009 + 25300900 = 6753^2 + 5030^2 .

It is a cyclic number.

It is not a de Polignac number, because 70903909 - 2¹ = 70903907 is a prime.

It is a super-2 number, since 2×70903909² = 10054728622960562, which contains 22 as substring.

Together with 70903907, 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 (70903901) 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, 35451954 + 35451955.

It is an arithmetic number, because the mean of its divisors is an integer number (35451955).

Almost surely, 2^70903909 is an apocalyptic number.

It is an amenable number.

70903909 is a deficient number, since it is larger than the sum of its proper divisors (1).

70903909 is an equidigital number, since it uses as much as digits as its factorization.

70903909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 70903909 is about 8420.4458908065. The cubic root of 70903909 is about 413.8948852913.

The spelling of 70903909 in words is "seventy million, nine hundred three thousand, nine hundred nine".