70909247 has 2 divisors, whose sum is σ = 70909248. Its totient is φ = 70909246.

The previous prime is 70909243. The next prime is 70909291. The reversal of 70909247 is 74290907.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70909247 - 2² = 70909243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70909247.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70909243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35454623 + 35454624.

It is an arithmetic number, because the mean of its divisors is an integer number (35454624).

Almost surely, 2^70909247 is an apocalyptic number.

70909247 is a deficient number, since it is larger than the sum of its proper divisors (1).

70909247 is an equidigital number, since it uses as much as digits as its factorization.

70909247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 70909247 is about 8420.7628514286. The cubic root of 70909247 is about 413.9052717213.

The spelling of 70909247 in words is "seventy million, nine hundred nine thousand, two hundred forty-seven".