70991047 has 2 divisors, whose sum is σ = 70991048. Its totient is φ = 70991046.

The previous prime is 70991033. The next prime is 70991051. The reversal of 70991047 is 74019907.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70991047 - 2⁷ = 70990919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 70990997 and 70991015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70991017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35495523 + 35495524.

It is an arithmetic number, because the mean of its divisors is an integer number (35495524).

Almost surely, 2^70991047 is an apocalyptic number.

70991047 is a deficient number, since it is larger than the sum of its proper divisors (1).

70991047 is an equidigital number, since it uses as much as digits as its factorization.

70991047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 70991047 is about 8425.6184936181. The cubic root of 70991047 is about 414.0643691678.

The spelling of 70991047 in words is "seventy million, nine hundred ninety-one thousand, forty-seven".