70809047 has 2 divisors, whose sum is σ = 70809048. Its totient is φ = 70809046.

The previous prime is 70809031. The next prime is 70809061. The reversal of 70809047 is 74090807.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70809047 - 2⁴ = 70809031 is a prime.

It is a super-2 number, since 2×70809047² = 10027842274096418, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70808998 and 70809016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70809547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35404523 + 35404524.

It is an arithmetic number, because the mean of its divisors is an integer number (35404524).

Almost surely, 2^70809047 is an apocalyptic number.

70809047 is a deficient number, since it is larger than the sum of its proper divisors (1).

70809047 is an equidigital number, since it uses as much as digits as its factorization.

70809047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 70809047 is about 8414.8111684101. The cubic root of 70809047 is about 413.7102202516.

The spelling of 70809047 in words is "seventy million, eight hundred nine thousand, forty-seven".