70870687 has 2 divisors, whose sum is σ = 70870688. Its totient is φ = 70870686.

The previous prime is 70870649. The next prime is 70870711. The reversal of 70870687 is 78607807.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70870687 - 2⁷ = 70870559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70870187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435343 + 35435344.

It is an arithmetic number, because the mean of its divisors is an integer number (35435344).

Almost surely, 2^70870687 is an apocalyptic number.

70870687 is a deficient number, since it is larger than the sum of its proper divisors (1).

70870687 is an equidigital number, since it uses as much as digits as its factorization.

70870687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 43.

The square root of 70870687 is about 8418.4729612917. The cubic root of 70870687 is about 413.8302317613.

The spelling of 70870687 in words is "seventy million, eight hundred seventy thousand, six hundred eighty-seven".