70871287 has 2 divisors, whose sum is σ = 70871288. Its totient is φ = 70871286.

The previous prime is 70871261. The next prime is 70871299. The reversal of 70871287 is 78217807.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70871287 - 2¹⁹ = 70346999 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70871587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35435643 + 35435644.

It is an arithmetic number, because the mean of its divisors is an integer number (35435644).

Almost surely, 2^70871287 is an apocalyptic number.

70871287 is a deficient number, since it is larger than the sum of its proper divisors (1).

70871287 is an equidigital number, since it uses as much as digits as its factorization.

70871287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43904, while the sum is 40.

The square root of 70871287 is about 8418.5085971329. The cubic root of 70871287 is about 413.8313996040.

The spelling of 70871287 in words is "seventy million, eight hundred seventy-one thousand, two hundred eighty-seven".