70909313 has 2 divisors, whose sum is σ = 70909314. Its totient is φ = 70909312.

The previous prime is 70909309. The next prime is 70909331. The reversal of 70909313 is 31390907.

It is a happy number.

Together with next prime (70909331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68029504 + 2879809 = 8248^2 + 1697^2 .

It is a cyclic number.

It is not a de Polignac number, because 70909313 - 2² = 70909309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70909313.

It is not a weakly prime, because it can be changed into another prime (70909393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35454656 + 35454657.

It is an arithmetic number, because the mean of its divisors is an integer number (35454657).

Almost surely, 2^70909313 is an apocalyptic number.

It is an amenable number.

70909313 is a deficient number, since it is larger than the sum of its proper divisors (1).

70909313 is an equidigital number, since it uses as much as digits as its factorization.

70909313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 32.

The square root of 70909313 is about 8420.7667703125. The cubic root of 70909313 is about 413.9054001377.

The spelling of 70909313 in words is "seventy million, nine hundred nine thousand, three hundred thirteen".